英、美制螺纹标准直径、螺距参照表
英美制特制螺纹对照表
英美制特制螺纹对照表(附图)英制美制迫牙丝攻钻孔径对照表图美制螺纹和英制管螺纹对照表英制美制联合螺纹和英美美联细螺纹对照表英制螺纹规格和公制螺纹规格对照表6g 外螺纹大径6H 内螺纹小径序号规格型号最大最小公差最大最小公差1 M10*1 9.974 9.794 0.180 9.157 8.917 0.2402 M12*1.5 11.968 11.732 0.236 10.676 10.376 0.3003 M14*1.5 13.968 13.732 0.236 12.676 12.376 0.3004 M16*1.5 15.968 15.732 0.236 14.676 14.376 0.3005 M18*1.5 17.968 17.732 0.236 16.676 16.376 0.3006 M20*1.5 19.968 19.732 0.236 18.676 18.376 0.3007 M22*1.5 21.968 21.732 0.236 20.676 20.376 0.3008 M24*1.5 23.968 23.732 0.236 22.676 22.376 0.3009 M26*1.5 25.968 25.732 0.236 24.676 24.376 0.30010 M27*1.5 26.968 26.732 0.236 25.676 25.376 0.30011 M30*1.5 29.968 29.732 0.236 28.676 28.376 0.30012 M27*2 26.962 26.682 0.280 25.210 24.835 0.37513 M30*2 29.962 29.682 0.280 28.210 27.835 0.37514 M33*2 32.962 32.682 0.280 31.210 30.835 0.37515 M36*2 35.962 35.682 0.280 34.210 33.835 0.37516 M42*2 41.962 41.682 0.280 40.210 39.835 0.3751 G1/8-28 9.728 9.514 0.214 8.848 8.566 0.2822 G1/4-19 13.157 12.907 0.250 11.890 11.445 0.4453 G3/8-19 16.662 16.412 0.250 15.395 14.950 0.4454 G1/2-14 20.955 20.671 0.284 19.172 18.631 0.5415 G3/4-14 26.441 26.157 0.284 24.658 24.117 0.5416 G1-11 33.249 32.889 0.360 30.931 30.291 0.6407 G11/4-11 41.910 41.550 0.360 39.592 38.952 0.6408 G11/2-11 47.803 47.443 0.360 45.485 44.845 0.640英制螺纹的识别英寸制统一螺纹，在英寸制国家广泛采用，该类螺纹分三个系列：粗牙系列UNC，细牙系列UNF，特细牙系列UNFF，外加一个定螺距系列UN。
普通的公制、英制、美制螺纹计算公式，附最新英制螺纹对照表
普通的公制、英制、美制螺纹计算公式，附最新英制螺纹对照表公制螺纹(MM牙)牙深=0.6495*牙距P(牙角60度)内牙孔径= 公称直径-1.0825*PM20x2.5-6H/7g (右手)-(单头螺纹)-(公制粗牙)(公称直径20mm) (牙距2.5mm)(内螺纹配合等级6H)(外螺纹配合等级7g)左-双头-M20x1.5 (左手)-(双头螺纹)-(公制细牙)(公称直径20mm) (牙距1.5mm)美制螺纹(统一标准螺纹)牙深= 0.6495*(25.4/每吋牙数)(牙角60度)3/4-10UNC-2A(UNC粗牙)(UNF细牙)(1A 2A 3A 外牙公差配合等级)(1B 2B 3B 内牙公差配合等级)UNC美制统一标准粗牙螺纹外径3/4英吋,每英吋10牙外牙 2级公差配合管螺纹(英制PT)牙深= 0.6403*(25.4/每吋牙数)(牙角55度)PT 3/4-14 (锥度管螺纹) 锥度管螺纹,锥度比1/16 3/4英吋管用,每英吋14牙螺纹(PS直螺纹)(PF细牙)牙深= 0.6403*(25.4/每吋牙数)(牙角55度)PS 3/4-14 (直形管螺纹)PF1 1/8-16 (直形管螺纹)(细牙)直形管螺纹3/4英吋管用,每英吋14牙1 1/8英吋管用,每英吋16牙管螺纹(美制NPT)(牙角60度)NPT 3/4-14 (锥形管螺纹) 锥形管螺纹,锥度比1/16 3/4英吋管用,每英吋14牙梯形螺纹(30度公制)TM40*6 公称直径40mm 牙距6.0mm梯形螺纹(29度爱克姆螺纹)TW26*5 外径26mm,每英吋5牙方形螺纹车牙的计算考虑条件计算公式公制牙与英制牙的转换每吋螺纹数 n = 25.4 / 牙距 P牙距 P = 25.4 / 每吋螺纹数 n因为工件材料及刀具所决定的转速转速 N = (1000周速 V ) / (圆周率 p * 直径 D )因为机器结构所决定的转速刀座快速移动的影响车牙最高转速 N = 4000/ P刀座快速移动加减速的影响下刀点与退刀点的计算(不完全牙的计算) 下刀最小距离 L1L1 = (牙距 P ) * (主轴转速 S ) / 500退刀最距离 L2L2 = (牙距 P ) * (主轴转速 S ) / 2000牙深及牙底径d 牙深 h =0.6495 * P牙底径 d =公称外径 D - 2 * h例题：车制外牙3/4'-10UNC 20mm长公制牙与英制牙的转换牙距 P = 25.4 / (吋螺纹数 n)P = 25.4 / 10 = 2.54mm因为工件材料及刀具所决定的转速外径 D = 3 / 4英吋 = 25.4 * (3/4) =19.05MM转速 N = (1000周速V) / (圆周率 p * 直径 D )N = 1000V / pD = 1000 * 120 / (3.1416*19.05)=2005 rpm (转/分)因为机器结构所决定的转速刀座快速移动的影响车牙最高转速 N =4000 / PN = 4000/2.54 = 1575 rpm综合工件材料刀具及机械结构所决定的转速 N = 1575 转N = 2005转两者转速选择较低者,即1575转刀座快速移动加减速的影响下刀点与退刀点的计算(不完全牙的计算) 下刀最小距离 L1L1 = (牙距P) * (主轴转速S) / 500L1 = 2.54*1575/500=8.00mm退刀最小距离 L2L2 = (牙距P) * (主轴转速S) / 2000L2 = 2.54*1575/2000=2.00mm牙深及牙底径d 牙深径d = 公称外径D-2*h =19.05-2*1.65 = 15.75mm附表：英制普通螺纹(惠氏螺纹) -- 小螺纹系列(BA)名义尺寸牙型代号大径螺距每英寸牙数中径小径牙型高底孔直径BA mm mm tpi mm 外螺纹H1 mmd=D p d2=D2 d3No. 14 BA 1 0.23 110.4 0.86 0.72 0.14 0.75 No. 13 BA 1.2 0.25 101.6 1.05 0.9 0.15 0.95 No. 12 BA 1.3 0.28 90.71 1.13 0.96 0.17 1 No. 11 BA 1.5 0.31 81.93 1.315 1.13 0.185 1.2 No. 10 BA 1.7 0.35 72.57 1.49 1.28 0.21 1.35 No. 9 BA 1.9 0.39 65.12 1.665 1.43 0.235 1.5 No. 8 BA 2.2 0.43 59.07 1.94 1.68 0.26 1.8 No. 7 BA 2.5 0.48 52.92 2.21 1.92 0.29 2 No. 6 BA 2.8 0.53 47.92 2.48 2.16 0.32 2.3 No. 5 BA 3.2 0.59 43.05 2.845 2.49 0.355 2.6 No. 4 BA 3.6 0.66 38.48 3.205 2.81 0.395 2.95 No. 3 BA 4.1 0.73 34.79 3.66 3.22 0.44 3.4 No. 2 BA 4.7 0.81 31.35 4.215 3.73 0.485 3.9 No. 1 BA 5.3 0.9 28.22 4.76 4.22 0.54 4.4No. 0 BA 6 1 25.4 5.4 4.8 0.6 5 55°圆锥管螺纹型式和尺寸（2006-03-13 14:38:47 ）螺纹代号基本尺寸大径螺距每英寸牙数中径小径牙型高度圆弧尺寸底英寸mm mm tpi mm 外螺纹H1 r mm d=D p d2=D2 d3R 1/16 1/16＂7.723 0.907 28 7.142 6.561 0.581 0.125 6. R 1/8 1/8＂9.728 0.907 28 9.147 8.566 0.581 0.125 8. R 1/4 1/4＂13.157 1.337 19 12.301 11.445 0.856 0.184 11 R 3/8 3/8＂16.662 1.337 19 15.806 14.95 0.856 0.184 14 R 1/2 1/2＂20.955 1.814 14 19.793 18.631 1.162 0.249 18 R 3/4 3/4＂26.441 1.814 14 25.279 24.117 1.162 0.249 23 R 1 1＂33.249 2.309 11 31.77 30.291 1.479 0.317 30 R 1 1/4 1 1/4＂ 41.91 2.309 11 40.431 38.952 1.479 0.317 38 R 1 1/2 1 1/2＂ 47.803 2.309 11 46.324 44.845 1.479 0.317 44 R 2 2＂59.614 2.309 11 58.135 56.656 1.479 0.317 56 R 2 1/2 2 1/2＂ 75.184 2.309 11 73.705 72.226 1.479 0.317 71 R 3 3＂87.884 2.309 11 86.405 84.926 1.479 0.317 85 R 4 4＂113.03 2.309 11 111.551 110.072 1.479 0.317 11 R 5 5＂138.43 2.309 11 136.951 135.472 1.479 0.317 13 R 6 6＂163.83 2.309 11 162.351 160.872 1.479 0.317 16制惠氏螺纹的型式尺寸英制普通螺纹(惠氏螺纹) -- 粗牙(BSW)名义尺寸牙型代号大径螺距每英寸牙数中径小径牙型高底孔直径Ww mm mm tpi mm 外螺纹H1 mmd=D p d2=D2 d31/16＂BSW 1.587 0.423 60 1.315 1.05 0.27 1.15 3/32＂BSW 2.381 0.529 48 2.041 1.703 0.338 1.9 1/8＂BSW 3.175 0.635 40 2.768 2.362 0.406 2.5 5/32＂BSW 3.969 0.793 32 3.459 2.952 0.507 3.2 3/16＂BSW 4.762 1.058 24 4.084 3.407 0.677 3.7 7/32＂BSW 5.556 1.058 24 4.878 4.201 0.677 4.5 1/4＂BSW 6.35 1.27 20 5.537 4.724 0.813 5.1 5/16＂BSW 7.938 1.411 18 7.034 6.131 0.904 6.53/8＂BSW 9.525 1.588 16 8.509 7.492 1.017 7.9 7/16＂BSW 11.113 1.814 14 9.951 8.789 1.162 9.2 1/2＂BSW 12.7 2.117 12 11.345 9.99 1.355 10.4 5/8＂BSW 15.876 2.309 11 14.397 12.918 1.479 13.4 3/4＂BSW 19.051 2.54 10 17.424 15.798 1.627 16.25 7/8＂BSW 22.226 2.822 9 20.419 18.611 1.807 19.25 1＂BSW 25.4 3.175 8 23.368 21.335 2.033 221 1/8＂BSW 28.576 3.629 7 26.253 23.929 2.324 24.5 1 1/4＂BSW 31.751 3.629 7 29.428 27.104 2.324 27.25 1 3/8＂BSW 34.926 4.233 6 32.215 29.505 2.711 30.25 1 1/2＂BSW 38.1 4.233 6 35.391 32.68 2.711 33.5 1 5/8＂BSW 41.277 5.08 5 38.024 34.771 3.253 35.5 1 3/4＂BSW 44.452 5.08 5 41.199 37.946 3.253 38.5 1 7/8＂BSW 47.627 5.6454 1/2 44.012 40.398 3.614 41.25 2＂BSW 50.802 5.645 4 1/2 47.187 43.573 3.614 44.5 2 1/4＂BSW 57.152 6.35 4 53.086 49.02 4.066 502 1/2＂BSW 63.502 6.35 4 59.436 55.37 4.066 562 3/4＂BSW 69.853 7.257 3 1/2 65.205 60.558 4.647 61.5 3＂BSW 76.203 7.257 3 1/2 71.556 66.909 4.647 683 1/4＂BSW 82.553 7.816 3 1/4 77.548 72.544 5.005 73.75 3 1/2＂BSW 88.903 7.816 3 1/4 83.899 78.894 5.005 803 3/4＂BSW 95.254 8.467 3 89.832 84.41 5.422 85.5 4＂BSW 101.604 8.467 3 96.182 90.76 5.422 924 1/4＂BSW 107.954 8.835 2 7/8 102.297 96.639 5.657 984 1/2＂BSW 114.304 8.835 2 7/8 108.647 102.99 5.657 104.2 4 3/4＂BSW 120.665 9.237 2 3/4 114.74 108.625 5.915 110 5＂BSW 127.005 9.237 2 3/4 121.09 115.176 5.915 116.5 5 1/4＂BSW 133.355 9.677 2 5/8 127.159 120.963 6.196 122.5 5 1/2＂BSW 139.705 9.677 2 5/8 133.509 127.313 6.196 128.5 5 3/4＂BSW 146.055 10.16 2 1/2 139.549 133.043 6.506 134.5 6＂BSW 152.406 10.16 2 1/2 145.9 139.394 6.506 141 英制普通螺纹-- 细牙-- BSF英制普通螺纹(惠氏螺纹) -- 细牙(BSW)名义尺寸牙型代号大径螺距每英寸牙数中径小径牙型高底孔直径BSF mm mm tpi mm 外螺纹H1 mm d=D p d2=D2 d33/16 BSF 4.763 0.794 32 4.255 3.747 0.508 47/32 BSF 5.556 0.907 28 4.975 4.394 0.581 4.6 1/4 BSF 6.35 0.977 26 5.725 5.1 0.625 5.3 9/32 BSF 7.142 0.977 26 6.518 5.893 0.625 6.1 5/16 BSF 7.938 1.156 22 7.199 6.459 0.739 6.8 3/8 BSF 9.525 1.27 20 8.712 7.899 0.813 8.3 7/16 BSF 11.113 1.411 18 10.209 9.304 0.904 9.7 1/2 BSF 12.7 1.588 16 11.684 10.668 1.017 11.1 9/16 BSF 14.288 1.588 16 13.272 12.256 1.017 12.7 5/8 BSF 15.875 1.814 14 14.712 13.549 1.162 1411/16 BSF 17.463 1.814 14 16.3 15.137 1.162 15.5 3/4 BSF 19.05 2.117 12 17.693 16.336 1.355 16.75 13/16 BSF 20.638 2.117 12 19.281 17.924 1.355 18.25 7/8 BSF 22.225 2.309 11 20.747 19.269 1.479 19.75 1.00 BSF 25.4 2.54 10 23.774 22.148 1.627 22.75 1 1/8 BSF 28.575 2.822 9 26.769 24.963 1.807 26.5 1 1/4 BSF 31.75 2.822 9 29.944 28.138 1.807 28.75 1 3/8 BSF 34.925 3.175 8 32.893 30.861 2.033 31.5 1 1/2 BSF 38.1 3.175 8 36.068 34.036 2.033 34.5 1 5/8 BSF 41.275 3.175 8 39.243 37.211 2.033 381 3/4 BSF 44.45 3.629 7 42.126 39.802 2.324 40.52 BSF 50.8 3.629 7 48.476 46.152 2.324 472 1/4 BSF 57.15 4.234 6 54.44 51.73 2.711 532 1/2 BSF 63.5 4.234 6 60.79 58.08 2.711 592 3/4 BSF 69.85 4.234 6 67.14 64.43 2.711 -3 BSF 76.2 5.08 5 72.946 69.692 3.253 -3 1/4 BSF 82.55 5.08 5 79.296 76.042 3.253 -3 1/2 BSF 88.9 5.6454 1/2 85.285 81.67 3.614 -3 3/4 BSF 95.25 5.645 4 1/2 91.635 88.02 3.614 -4 BSF 101.6 5.645 4 1/2 97.985 94.37 3.614 -4 1/4 BSF 107.95 6.35 4 103.886 99.822 4.066 - 55°圆柱管螺纹的型式和尺寸British Pipe Thread (惠氏管螺纹) -- 圆柱(BSPP/BSPF)螺纹代号基本尺寸大径螺距每英寸牙数中径小径牙型高度底孔尺寸mm mm tpi mm 外螺纹H1 mmd=D p d2=D2 d3G 1/8 1/8＂9.728 0.907 28 9.147 8.566 0.581 8.7 G 1/4 1/4＂13.157 1.337 19 12.301 11.445 0.856 11.6 G 3/8 3/8＂16.662 1.337 19 15.806 14.95 0.856 15G 1/2 1/2＂20.955 1.814 14 19.793 18.631 1.162 19G 5/8 5/8＂22.911 1.814 14 21.749 20.587 1.162 20.75 G 3/4 3/4＂26.441 1.814 14 25.279 24.117 1.162 24.5 G 7/8 7/8＂30.201 1.814 14 29.039 27.877 1.162 28G 1 1＂33.249 2.309 11 31.77 30.291 1.479 30.5 G 1 1/8 1 1/8＂ 37.897 2.309 11 36.418 34.939 1.479 35G 1 1/4 1 1/4＂ 41.91 2.309 11 40.431 38.952 1.479 39.5 G 1 3/8 1 3/8＂ 44.323 2.309 11 42.844 41.365 1.479 41.5 G 1 1/2 1 1/2＂ 47.803 2.309 11 46.324 44.845 1.479 45G 1 3/4 1 3/4＂ 53.746 2.309 11 52.267 50.788 1.479 51G 2 2＂59.614 2.309 11 58.135 56.656 1.479 57G 2 1/4 2 1/4＂ 65.71 2.309 11 64.231 62.752 1.479 63G 2 1/2 2 1/2＂ 75.184 2.309 11 73.705 72.226 1.479 72.5 G 2 3/4 2 3/4＂ 81.534 2.309 11 80.055 78.576 1.479 79G 3 3＂87.884 2.309 11 86.405 84.926 1.479 85.5 G 3 1/4 3 1/4＂ 93.98 2.309 11 92.501 91.022 1.479 91G 3 1/2 3 1/2＂ 100.33 2.309 11 98.351 97.372 1.479 97.75 G 3 3/4 3 3/4＂ 106.68 2.309 11 105.201 103.722 1.479 104 G 4 4＂113.03 2.309 11 111.55 110.072 1.479 110.5 G 4 1/2 4 1/2＂ 125.73 2.309 11 124.251 122.772 1.479 123 G 5 5＂138.43 2.309 11 136.951 135.472 1.479 136 G 5 1/2 5 1/2＂ 151.13 2.309 11 149.651 148.172 1.479 148.5 G 6 6＂163.83 2.309 11 162.351 160.872 1.479 161.5RC2英寸锥管螺纹，每英寸11牙，螺距=25.4/11即2.309，牙高（深）=2.309×0.64即1.479，锥度是固定的即1：16R等于1/32乘以长度1/32意思是，锥螺纹的锥度是1：16 ，单边就是1：32长度意思是：定位点加有效长度比如我定位3.0，有效长度是12.0R=1/32 X（3+12）=0.468751、密封管螺纹（R）英制密封管螺纹的基本尺寸及其公差配合方式英制密封管螺纹有两种配合方式：圆柱内螺纹与圆锥外螺纹组成“柱/锥”配合；圆锥内螺纹与圆锥外螺纹组成“锥/锥”配合.欧洲国家主要采用“柱/锥”配合螺纹；而欧洲以外国家则主要采用“柱/锥”配合螺纹.两种螺纹的检验量规存在一定不同；目前的ISO 英制密封管螺纹量规标准（ISO 7-2：2000）是按“柱/锥”配合体系设计的.编辑本段密封管螺纹的标记英制密封管螺纹的完整标记由螺纹特征代号、螺纹尺寸代号和旋向代号组成.英制密封圆柱内螺纹的特征代号为：RP；英制密封圆锥内螺纹的特征代号为：RC；英制密封圆锥外螺纹的特征代号为：R1（与英制密封圆柱内螺纹配合使用）；R2（与英制密封圆锥内螺纹配合使用）；左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标.对密封管螺纹，利用RP/R1，RC/R2分别表示“柱/锥” 和“锥/锥”螺纹副.2、非密封管螺纹英制非密封管的基本尺寸及其极限偏差标记:英制非密封管螺纹的完整标记由螺纹特征代号，螺纹尺寸代号，中径公差等级代号和旋向代号组成.英制非密封圆柱螺纹的特征代号为：G对英制非密封圆柱内螺纹，其中径公差等级代号省略不标；而英制非密封圆柱外螺纹的中径公尺等级代号分别为A和B.左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标.当表示英制非密封管螺纹的螺纹副时，仅标注外螺纹的标记代号.示例：尺寸代号为2的右旋，非密封圆柱内螺纹：G2尺寸代号为3的A级，右旋，非密封圆柱外螺纹：G3A尺寸代号为4的B级，左旋，非密封圆柱外螺纹：G4 B-LH尺寸代号为2的右旋，非密封圆柱内螺纹与A级圆柱外螺纹组成的螺纹副：G2A加工内孔螺纹的是管螺纹丝锥加工外螺纹的有板牙。
各国标准螺纹基本尺寸对照表
英制管螺纹基本尺寸及公差（牙形角55º）BSPP之宇文皓月创作英制锥管螺纹基本尺寸及公差（牙形角55º）BSPT美制管螺纹基本尺寸及公差（牙形角60º）UN(F)布锥管螺纹基本尺寸及公差(牙形角60º)NPT公制螺纹基本尺寸及公差(牙形角60º)M55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达55°圆锥管螺纹(BSPT)6 0 09 1 872聊城市鑫茂祥管业有限公司专业经营钢管规格：5mm*1mm—1020mm*200mm 合金钢管、外径22mm-127mm冷轧无缝钢管、外径127mm-600mm，壁厚16mm-100mm，外径精度±0.5%,壁厚精度±5%热轧中厚壁无缝钢管、16Mn 外径400—1600mm、壁厚20—60mm的大口径厚壁卷管，可定尺到16米及各种规格的无缝方管、异型无缝钢管等.常备钢管种类有:构造用无缝钢管、流体用无缝钢管、液压无缝钢管、电力用无缝钢管、石油输送用无缝钢管、化肥设备用无缝钢管、煤矿用无缝钢管、不锈钢无缝钢管、化工用无缝钢管、纺织机械用无缝钢管、汽车；水利用无缝钢管，精密无缝钢管、光亮无缝钢管、军工医疗用无缝钢管、管道用无缝钢管、支柱用无缝钢管、合金无缝管、高压无缝管、大口径直缝焊管等。
适用于工程、煤矿、纺织、电力、锅炉、机械、军工等各个领域。
公司以良好的信用、优质的产品、雄厚的实力、低廉的价钱享誉全国30多个省、市、自治区、直辖市及国外，产品深得用户依赖。
管螺纹的基本尺寸表(2010-10-25 15:57:35)标签：杂谈表（1）螺纹基本尺寸G1/2 、ZG1/2 (单位:mm)尺寸代每螺距p 牙型圆弧半基面上的基本直径基准有效锥管螺纹的基本尺寸表（3-28）1/2PT 、1/2NPT 表（2）螺纹基本尺寸 (单位:mm)螺纹尺度的一种，按外形分圆柱、圆锥两种；按牙型角分55°、60°两种。
各国标准螺纹基本尺寸对照表
英制管螺纹基本尺寸及公差（牙形角55º）BSPP英制锥管螺纹基本尺寸及公差（牙形角55º）BSPT美制管螺纹基本尺寸及公差（牙形角60º）UN(F)布锥管螺纹基本尺寸及公差(牙形角60º) NPT公制螺纹基本尺寸及公差(牙形角60º) M55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达55°圆锥管螺纹(BSPT)聊城市鑫茂祥管业专业经营钢管规格：5mm*1mm—1020mm*200mm合金钢管、外径22mm-127mm冷轧无缝钢管、外径127mm-600mm，壁厚16mm-100mm，外径精度±0.5%,壁厚精度±5%热轧中厚壁无缝钢管、16Mn外径400—1600mm、壁厚20—60mm的大口径厚壁卷管，可定尺到16米及各种规格的无缝管、异型无缝钢管等.常备钢管种类有:构造用无缝钢管、流体用无缝钢管、液压无缝钢管、电力用无缝钢管、油输送用无缝钢管、化肥设备用无缝钢管、煤矿用无缝钢管、不锈钢无缝钢管、化工用无缝钢管、纺织机械用无缝钢管、汽车；水利用无缝钢管，精密无缝钢管、光亮无缝钢管、军工医疗用无缝钢管、管道用无缝钢管、支柱用无缝钢管、合金无缝管、高压无缝管、大口径直缝焊管等。
适用于工程、煤矿、纺织、电力、锅炉、机械、军工等各个领域。
公司以良好的信用、优质的产品、雄厚的实力、低廉的价享誉全国30多个省、市、自治区、直辖市及国外，产品深得用户依赖。
管螺纹的基本尺寸表(2010-10-25 15:57:35)▼标签：杂谈表（1）螺纹基本尺寸G1/2 、ZG1/2 (单位:mm)尺寸代号每25.4mm类的牙数n螺距p 牙型高度h圆弧半径r≈基面上的基本直径基准距离有效螺纹长度大径（基准直径）d=D中径d2=D2小径d1=D11/16 28 0.907 0.581 0.125 7.723 7.142 6.561 4.0 6.5 1/8 28 0.907 0.581 0.125 9.728 9.147 8.566 4.0 6.5 1/4 19 1.337 0.586 0.184 13.157 12.301 11.445 6.0 9.7 3/8 19 1.337 0.586 0.184 16.662 15.806 14.950 6.4 10.1 1/2 14 1.814 1. 0.249 20.955 19.793 18.631 8.2 13.2 3/4 14 1.814 1. 0.249 26.441 25.279 24.117 9.5 14.5 1 11 2.309 1.479 0.317 33.249 31.770 30.291 10.4 16.8 1.1/4 11 2.309 1.479 0.317 41.910 40.431 38.952 12.7 19.11.1/2 112.309 1.479 0.317 47.803 46.324 44.845 12.7 19.12 11 2.309 1.479 0.317 59.614 58. 56.656 15.9 23.42.1/2 11 2.309 1.479 0.317 75.184 73.705 72.226 17.5 26.73 11 2.309 1.479 0.317 87.884 86.405 84.926 20.6 29.83.1/2 11 2.309 1.479 0.317 100.330 98.851 97.372 22.2 31.44 11 2.309 1.479 0.317 113.030 111.551 110.072 25.4 35.85 11 2.309 1.479 0.317 .430 136.951 .472 28.6 40.16 11 2.309 1.479 0.317 163.830 .351 160.872 28.6 40.1锥管螺纹的基本尺寸表（3-28）1/2PT 、1/2NPT表（2）螺纹基本尺寸(单位:mm)螺纹标准的一种，按外形分圆柱、圆锥两种；按牙型角分55°、60°两种。
各国标准 螺纹基本尺寸对照表
英制管螺纹基本尺寸及公差（牙形角55º）BSPP55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达55°圆锥管螺纹(BSPT)2 6R 44"113.032.30911111.551110.721.479R 55"138.432.30911136.951135.4721.479R 66"163.832.30911162.351160.8721.479聊城市鑫茂祥管业有限公司专业经营钢管规格：5mm*1mm—1020mm*200mm合金钢管、外径22mm-127mm 冷轧无缝钢管、外径127mm-600mm，壁厚16mm-100mm，外径精度±0.5%,壁厚精度±5%热轧中厚壁无缝钢管、16Mn外径400—1600mm、壁厚20—60mm的大口径厚壁卷管，可定尺到16米及各种规格的无缝方管、异型无缝钢管等.常备钢管种类有:构造用无缝钢管、流体用无缝钢管、液压无缝钢管、电力用无缝钢管、石油输送用无缝钢管、化肥设备用无缝钢管、煤矿用无缝钢管、不锈钢无缝钢管、化工用无缝钢管、纺织机械用无缝钢管、汽车；水利用无缝钢管，精密无缝钢管、光亮无缝钢管、军工医疗用无缝钢管、管道用无缝钢管、支柱用无缝钢管、合金无缝管、高压无缝管、大口径直缝焊管等。
适用于工程、煤矿、纺织、电力、锅炉、机械、军工等各个领域。
公司以良好的信用、优质的产品、雄厚的实力、低廉的价钱享誉全国30多个省、市、自治区、直辖市及国外，产品深得用户依赖。
管螺纹的基本尺寸表(2010-10-25 15:57:35) 转载▼标签：杂谈表（1）螺纹基本尺寸G1/2 、ZG1/2 (单位:mm)锥管螺纹的基本尺寸表（3-28）1/2PT 、1/2NPT表（2）螺纹基本尺寸 (单位:mm)螺纹尺度的一种，按外形分圆柱、圆锥两种；按牙型角分55°、60°两种。
螺纹基本尺寸对照表
螺纹根本尺寸对比表（以及螺纹底孔相干尺寸）参照机械设计师首册编制OPMSM2005年7月螺纹代号Thread code一.英制螺纹（螺纹牙型角55度）BSW——英国尺度惠氏螺纹（粗牙）BSF——英国尺度惠氏螺纹（细牙）G——直管螺纹(外螺纹分A.B两级即在螺纹中径公役有所差别,丝锥分G.G-D)非密封性螺纹R——锥管外螺纹（旧代号ZG;KG）RC——锥管内螺纹（旧代号ZG;KG）二.美制螺纹（螺纹牙型角60度）UNC——同一制粗牙螺纹（代替NC）UNF——同一制细牙螺纹（代替NF）UNEF——同一制超细牙螺纹UN——同一制不变螺距螺纹UNS——同一制特别螺纹三.美制螺纹（螺纹牙型角60度）NPT——一般用处锥管螺纹（旧代号Z.K）（斜角为1°47'即1：16）NPSC——管接头直管内螺纹NPSM——装备上自由合营,机械衔接用直管螺纹NPTF——干密封锥管螺纹NPSF——干密封燃料内螺纹NGT——气瓶用螺纹四.米制螺纹（螺纹牙型角60度,斜角为1°47'24"即1：16）ZM——米制锥管螺纹五.其它螺纹SM——缝纫机螺纹（螺纹牙型角60度,平顶.螺纹底部为园弧形）PZ——气瓶螺纹5V1至20V1——气门芯螺纹（螺纹牙型角60度,平顶.螺纹底部为园弧形）六.管螺纹（螺纹牙型角55度,螺纹顶.底部为园弧形约）RC——圆锥内螺纹（螺纹牙型角55度,斜角为1°47'即1：16）RP——圆柱内螺纹（螺纹牙型角55度）R——圆锥外螺纹（螺纹牙型角55度,斜角为1°47'即1：16）七.通俗螺纹（螺纹牙型角60度）M——通俗螺纹代号八.特别螺纹Tr——梯形螺纹（螺纹牙型角30度）B——锯齿形螺纹（牙型角30×30度）有用长度基面长度外径(d) 中径(d2) 内径(d1)911 612 6151719 1122 1323 1426 16303238本螺纹基面上各直径等于圆柱螺纹的各响应直径3/4″斜角（φ）1°47'24″锥角（2tgφ)=1:16公称直径每英寸牙螺距管子外径（d) 管接头螺纹内径（d1') 牙型高度(h1)（英寸）数（n)(t) 名义尺寸最大外径最小外径名义尺寸最大内径最小内径1/8 281/4 193/8 191/2 145/8 143/4 147/8 141 111-1/4 111-3/8 111-1/2 11 45 1-3/4 112 112-1/2 113 11外径d由公称直径所决议斜角（φ）1°47'24″锥角（2tgφ)=1:16公称直径（英寸）每英寸牙数（n)螺距(t)螺纹长度基面上螺纹直径牙型高度(h1) 有用长度基面长度外径(d)中径(d2)内径(d1)1/16 271/8 27 71/4 183/8 181/2 143/4 14 141 11-1/21-1/4 11-1/2 181-1/2 11-1/22 11-1/2 19外径d由公称直径所决议3/8″斜角（φ）1°47'24″锥角（2tgφ)=1:16公称直径每寸牙数螺距(t)外螺纹外径内螺纹内径选用钻头名义尺寸最大尺寸最小尺寸名义尺寸最大尺寸最小尺寸3/16″24 Φ1/4″20 Φ5/16″18 Φ3/8″16 Φ7/16″14 Φ1/2″12 Φ9/16″12 Φ5/8″11 Φ3/4″10 Φ7/8″9 Φ1″8 Φ22 1-1/8″71-1/4″71-3/8″ 61-1/2″ 61-3/4″ 51-7/8″2″内螺纹（d＇）公称直径 3/4″=19.05 mm外螺纹（d1）内径 d＇-1.28 t 3/4″=19.05 -1.28 * 2.54=15.79 mm 外螺纹（d1＇）内径 d＇-1.134 t 3/4″=19.05 -1.134 * 2.54=16.16 mm公称直径（英寸）每英寸牙数（n)螺距(t) 外螺纹外径内螺纹内径名义尺寸名义尺寸11/16 143/8 207/8 11 22 5/8 143/4 121/4 261/2 161 10内螺纹d'（公称直径）外螺纹d1=内径=d'-1.28t 3/4″内螺纹d1=内径=d'-1.134t 3/4″3/4″。
英制美制螺纹的区别及其对照表
英、美制紧固件螺纹英、美制紧固件螺纹英寸制螺纹包括惠氏螺纹（Whitworth thread）和统一标准螺纹（Unified thread）。
惠氏螺纹是英国英寸制规格紧固件用普通螺纹，其牙型角为55°，习惯用公称直径（单位为英寸inch）及每英寸牙数来表示，尺寸单位采用符号“””。
例如：1/2”-12BSW表示公称直径为1/2”的粗牙惠氏螺纹。
统一标准螺纹是美国英寸制规格紧固件用普通螺纹，其牙型角为60°，一般用号码（公称直径﹤1/4”）或公称直径的英寸分数（≥1/4”）、每英寸牙数和代号（UNC、UNF）来表示。
例如：1/2”-13UNC表示公称直径为1/2”的粗牙统一标准螺纹 。
惠氏螺纹和统一标准螺纹公称直径与每英寸牙数螺纹大径统一标准螺纹ANSI B1.1-182惠氏螺纹BS84-1956 inch尺寸代号粗牙UNC细牙UNF尺寸代号粗牙BSW细牙BSF0.06000#800.06251/16600.07301#64720.08602#56640.09383/32480.09903#48560.11204#40480.12505#40441/8400.13806#32400.15635/32320.16408#32360.18753/1624320.190010#24320.216012#24280.21897/3224280.25001/420281/420260.28129/32260.31255/1618245/1618220.37503/816243/816200.43757/1614207/1614180.50001/213201/212160.56259/1612189/1612160.62505/811185/811140.687511/1611140.75003/410163/410120.812513/16120.87507/89147/89111.0000181218101.12501-1/87121-1/8791.25001-1/47121-1/4791.37501-3/86121-3/881.50001-1/26121-1/2681.62501-5/81-5/881.75001-3/451-3/4572.00002 4.52 4.572.25002-1/4 4.52.50002-1/242.75002-3/443.0000343.25003-1/443.50003-1/243.75003-3/444.000044备注：各种英、美制螺纹代号说明BA-British AssociationBSW-British Standard WhitworthBSF-British Standard FineBSP-British Standard PipeBSPT-British Standard Pipe TaperedBSC-British Standard CycleUNC-Unified National CourseUNF-Unified National FineUNEF-Unified National Extra FineUNM-Unified National MiniatureNPT-National Pipe Tapered。
公制美制英制螺纹对照表
公制/美制/英制螺纹对照表A型美制螺纹（UNF）常用规格外螺纹螺纹-4 9/16"-19牙 14.28 13.08 -6 11/16''-16 17.46 16.1-8 13/16''-16 20.64 19.28-10 1''-14 25.40 23.57-12 1(3/16)''-12 30.00 28.32 -16 1(7/16)''-12 36.51 34.67 -20 1(11/16)''-12 42.86 41.02C型JIC37度美制UNF螺纹常用规格-4 7/16”-20 11.11 10.03-5 1/2”-20 12.70 11.32-6 9/16”-18 14.28 13.08-8 3/4”-16 19.00 17.68-10 7/8”-14 22.22 20.68-12 1(1/16)"-12 26.98 25.15 -16 1(5/16)"-12 33.33 31.5 -20 1(5/8)"-12 41.28 39.44 -24 1(7/8)"-12 47.62 45.8-32 2(1/2)"-12 63.5 61.67英制圆柱管螺纹（BSPP）常用规格-4 1/4”-19 13.157 11.55-6 3/8”-19 16.662 14.95-8 1/2”-14 20.955 18.63-12 3/4”-14 26.441 24.11-16 1”-11 33.249 30.29-20 1(1/4)''-11 41.91 38.95英制圆锥管螺纹（BSPT）常用规格基面大径基准距离1/4”-19 13.157 63/8”-19 16.662 6.41/2”-14 20.955 8.23/4”-14 26.441 9.51”-11 33.249 10.41(1/4)''-11 41.91 12.7美制圆锥管螺纹（NPT）1/8”-27 10.24 41/4”-18 13.60 43/8”-18 17.04 4.321/2”-14 21.22 4.483/4”-14 26.57 4.751”-11(1/2)” 33.22 4.61(1/4)”-11.5 41.96 4.832007-4-20 16:33评论(7)3/8-16 0.3643 0.3737 0.3287 0.3331 0.2970 8.40 8.44(0.375-16) 9.2532 9.4920 8.3490 8.4607 7.54387/16-14 0.4258 0.4361 0.3850 0.3897 0.3485 9.83 9.87(0.4375-14) 10.8153 11.0769 9.7790 9.8984 8.85191/2-13 0.4876 0.4985 0.4435 0.4485 0.4041 11.34 11.38(0.50-13) 12.3850 12.6619 11.2649 11.3919 10.26419/16-12 0.5495 0.5609 0.5016 0.5068 0.4587 12.80 12.84(0.5625-12) 13.9573 14.2469 12.7406 12.8727 11.65105/8-11 0.6113 0.6234 0.5589 0.5644 0.5119 14.27 14.32 (0.625-11) 15.5270 15.8344 14.1961 14.3358 13.00233/4-10 0.7353 0.7482 0.6773 0.6832 0.6255 17.28 17.33 (0.750-10) 18.6766 19.0043 17.2034 17.3533 15.88777/8-9 0.8592 0.8731 0.7946 0.8009 0.7368 20.27 20.32(0.875-9) 21.8237 22.1767 20.1828 20.3429 18.71471"-8 0.9830 0.9980 0.9100 0.9168 0.8446 23.22 23.27(1.000-8) 24.9682 25.3492 23.1140 23.2867 21.45281.螺胚直径指滚丝前的尺寸，数值为依经验公式计算而得，在实践中需验证。
公制美制英制螺纹对照表
公制/美制/英制螺纹对照表A型美制螺纹（UNF）常用规格外螺纹螺纹-4 9/16"-19牙 14.28 13.08 -6 11/16''-16 17.46 16.1-8 13/16''-16 20.64 19.28-10 1''-14 25.40 23.57-12 1(3/16)''-12 30.00 28.32 -16 1(7/16)''-12 36.51 34.67 -20 1(11/16)''-12 42.86 41.02C型JIC37度美制UNF螺纹常用规格-4 7/16”-20 11.11 10.03-5 1/2”-20 12.70 11.32-6 9/16”-18 14.28 13.08-8 3/4”-16 19.00 17.68-10 7/8”-14 22.22 20.68-12 1(1/16)"-12 26.98 25.15 -16 1(5/16)"-12 33.33 31.5 -20 1(5/8)"-12 41.28 39.44 -24 1(7/8)"-12 47.62 45.8-32 2(1/2)"-12 63.5 61.67英制圆柱管螺纹（BSPP）常用规格-4 1/4”-19 13.157 11.55-6 3/8”-19 16.662 14.95-8 1/2”-14 20.955 18.63-12 3/4”-14 26.441 24.11-16 1”-11 33.249 30.29-20 1(1/4)''-11 41.91 38.95英制圆锥管螺纹（BSPT）常用规格基面大径基准距离1/4”-19 13.157 63/8”-19 16.662 6.41/2”-14 20.955 8.23/4”-14 26.441 9.51”-11 33.249 10.41(1/4)''-11 41.91 12.7美制圆锥管螺纹（NPT）1/8”-27 10.24 41/4”-18 13.60 43/8”-18 17.04 4.321/2”-14 21.22 4.483/4”-14 26.57 4.751”-11(1/2)” 33.22 4.61(1/4)”-11.5 41.96 4.832007-4-20 16:33评论(7)3/8-16 0.3643 0.3737 0.3287 0.3331 0.2970 8.40 8.44(0.375-16) 9.2532 9.4920 8.3490 8.4607 7.54387/16-14 0.4258 0.4361 0.3850 0.3897 0.3485 9.83 9.87(0.4375-14) 10.8153 11.0769 9.7790 9.8984 8.85191/2-13 0.4876 0.4985 0.4435 0.4485 0.4041 11.34 11.38(0.50-13) 12.3850 12.6619 11.2649 11.3919 10.26419/16-12 0.5495 0.5609 0.5016 0.5068 0.4587 12.80 12.84(0.5625-12) 13.9573 14.2469 12.7406 12.8727 11.65105/8-11 0.6113 0.6234 0.5589 0.5644 0.5119 14.27 14.32 (0.625-11) 15.5270 15.8344 14.1961 14.3358 13.00233/4-10 0.7353 0.7482 0.6773 0.6832 0.6255 17.28 17.33 (0.750-10) 18.6766 19.0043 17.2034 17.3533 15.88777/8-9 0.8592 0.8731 0.7946 0.8009 0.7368 20.27 20.32(0.875-9) 21.8237 22.1767 20.1828 20.3429 18.71471"-8 0.9830 0.9980 0.9100 0.9168 0.8446 23.22 23.27(1.000-8) 24.9682 25.3492 23.1140 23.2867 21.45281.螺胚直径指滚丝前的尺寸，数值为依经验公式计算而得，在实践中需验证。
英制美制米制螺纹标准简表
英制、美制、米制螺纹标准简表一、英制螺纹（螺纹牙型角55度）Thread of British standard ( Thread pitch shape angle 55°) BSW－－－－英国标准惠氏螺纹（粗牙）British Standard Whitworth Thread ( Coarse ) BSF－－－－英国标准惠氏螺纹（细牙）British Standard Whitworth Thread ( Fine )G－－－－直管螺纹（外螺纹分A、B两面级、丝锥分G、G－D）Straight pipe thread ( Outside )thread in A\B: taps in G、G－D )R－－－－锥管外螺纹（旧代号ZG;KG）Outside paper pipe thread ( Old thread code ZG,KG )RC－－－－锥管内螺纹（旧代号ZG;KG）Inside taper pipe thread ( Old thread code ZG,KG )二、美制螺纹（螺纹牙型角60度）Thread of American standard ( Thread pitch shape angle 60°)UNC－－－－统一制粗牙螺纹（代替NC）Unified coarse pitch thread ( Instead of NC ) UNF－－－－统一制细牙螺纹（代替NF）Unified fine pitch thread ( Instead of NF ) UNEF－－－－统一制超细牙螺纹Unified superfine pitch threadUN－－－－－统一制不变螺距螺纹Unified threadUNS－－－－统一制特殊螺纹Unified Special threadNPT－－－－一般用途锥管螺纹（旧代号Z;K）Taper pipe thread for general purpose ( Old thread code Z,K )NPSC－－－－管接头直管内螺纹Internal straight pipe thread for connectionNPSM－－－－设备上自由配合，机械连接用直管螺纹Straight pipe thread for general purposeNPTF－－－－干密封锥管螺纹Dryseal taper pipe threadNPSF－－－－干密封燃油直管螺纹Dryseal straight pipe internal threadNGT－－－－气瓶用锥螺纹Special thread for gas cylinder三、米制螺纹Metric threadZM－－－－－米制锥管螺纹Metric taper pipe thread四、其它螺纹Other threadsSM－－－－缝纫机螺纹Thread for sewing machinePZ－－－－气瓶用锥螺纹Special thread for gas cylinder5V1－20V1－气门芯螺纹5V1－20V1－Tyre valve thread螺纹代号说明示例：Explanation of thread code. e. g.1/4－20UNC1/4－公称直径1/4" nominal dia. 1/4"20－每寸20牙twenty teeth per inchUNC－美标统一制粗牙螺纹unified coarse pitch thread ( American standard根据螺纹结构特点和用途可分为三大类：（一）、普通螺纹：牙形为三角形，用于连接或紧固零件。
各国标准螺纹基本尺寸对照表
英制管螺纹基本尺寸及公差（牙形角55o）BSPP英制锥管螺纹基本尺寸及公差（牙形角55o）BSPT美制管螺纹基本尺寸及公差（牙形角60o）UN(F)公制螺纹基本尺寸及公差(牙形角60o) M55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达55°圆锥管螺纹(BSPT)2R3" 113R4" 114R5" 115R6" 116聊城市鑫茂祥管业有限公司专业经营钢管规格：5mm*1mm—1020mm*200mm合金钢管、外径22mm-127mm冷轧无缝钢管、外径127mm-600mm，壁厚16mm-100mm，外径精度±%,壁厚精度±5%热轧中厚壁无缝钢管、16Mn外径400—1600mm、壁厚20—60mm的大口径厚壁卷管，可定尺到16米及各种规格的无缝方管、异型无缝钢管等.常备钢管种类有:构造用无缝钢管、流体用无缝钢管、液压无缝钢管、电力用无缝钢管、石油输送用无缝钢管、化肥设备用无缝钢管、煤矿用无缝钢管、不锈钢无缝钢管、化工用无缝钢管、纺织机械用无缝钢管、汽车；水利用无缝钢管，精密无缝钢管、光亮无缝钢管、军工医疗用无缝钢管、管道用无缝钢管、支柱用无缝钢管、合金无缝管、高压无缝管、大口径直缝焊管等。
适用于工程、煤矿、纺织、电力、锅炉、机械、军工等各个领域。
公司以良好的信用、优质的产品、雄厚的实力、低廉的价钱享誉全国30多个省、市、自治区、直辖市及国外，产品深得用户依赖。
管螺纹的基本尺寸表(2010-10-25 15:57:35)标签：表（1）螺纹基本尺寸G1/2、ZG1/2 (单位:mm)尺寸代每类的螺距p 牙型圆弧半基面上的基本直径基准有效锥管螺纹的基本尺寸表（3-28）1/2PT、1/2NPT 表（2）螺纹基本尺寸(单位:mm)寸Ww 牙型代号大径mmd=D螺距mmp每英寸牙数tpi中径mmd2=D2小径外螺纹d3牙型高H1底孔直径mm1/16" BSW 603/32" BSW 481/8" BSW 405/32" BSW 323/16" BSW 247/32" BSW 241/4" BSW 205/16" BSW 183/8" BSW 167/16" BSW 141/2" BSW 125/8" BSW 113/4" BSW 107/8" BSW 9 1" BSW 811/8" BSW 711/4" BSW 713/8" BSW 611/2" BSW 615/8" BSW 513/4" BSW 517/8" BSW 41/2 2" BSW 41/2 21/4" BSW 421/2" BSW 423/4" BSW 31/2 3" BSW 31/2 31/4" BSW 31/4 31/2" BSW 31/4 33/4" BSW 3 4" BSW 341/4" BSW 27/841/2" BSW 27/8 43/4" BSW 23/4 5" BSW 23/4 51/4" BSW 25/8 51/2" BSW 25/8 53/4" BSW 21/2 6" BSW 21/2英制普通螺纹--细牙--BSF英制普通螺纹(惠氏螺纹)--细牙(BSW)名义尺寸BSF 牙型代号大径mmd=D螺距mmp每英寸牙数tpi中径mmd2=D2小径外螺纹d3牙型高H1底孔直径mm3/16 BSF 32 7/32 BSF 28 1/4 BSF 26 9/32 BSF 26 5/16 BSF 22 3/8 BSF 20 7/16 BSF 18 1/2 BSF 16 9/16 BSF 16 5/8 BSF 14 11/16 BSF 14 3/4 BSF 12 13/16 BSF 12 7/8 BSF 11 1 BSF 10 11/8 BSF 9 11/4 BSF 9 13/8 BSF 8 11/2 BSF 8 15/8 BSF 8 13/4 BSF 7 2 BSF 7 21/4 BSF 6 21/2 BSF 623/4 BSF 6 -3 BSF 5 -31/4 BSF 5 -31/2 BSF 41/2 -33/4 BSF 41/2 -4 BSF 41/2 -41/4 BSF 4 -螺纹标记的标注当螺纹精度要求较高时，除标注螺纹代号外，还应标注螺纹公差带代号和螺纹旋合长度。
公制美制英制螺纹对照表
公制/美制/英制螺纹对照表A型美制螺纹（UNF）常用规格外螺纹螺纹-4 9/16"-19牙 14.28 13.08 -6 11/16''-16 17.46 16.1-8 13/16''-16 20.64 19.28-10 1''-14 25.40 23.57-12 1(3/16)''-12 30.00 28.32 -16 1(7/16)''-12 36.51 34.67 -20 1(11/16)''-12 42.86 41.02C型JIC37度美制UNF螺纹常用规格-4 7/16”-20 11.11 10.03-5 1/2”-20 12.70 11.32-6 9/16”-18 14.28 13.08-8 3/4”-16 19.00 17.68-10 7/8”-14 22.22 20.68-12 1(1/16)"-12 26.98 25.15 -16 1(5/16)"-12 33.33 31.5 -20 1(5/8)"-12 41.28 39.44 -24 1(7/8)"-12 47.62 45.8-32 2(1/2)"-12 63.5 61.67英制圆柱管螺纹（BSPP）常用规格-4 1/4”-19 13.157 11.55-6 3/8”-19 16.662 14.95-8 1/2”-14 20.955 18.63-12 3/4”-14 26.441 24.11-16 1”-11 33.249 30.29-20 1(1/4)''-11 41.91 38.95英制圆锥管螺纹（BSPT）常用规格基面大径基准距离1/4”-19 13.157 63/8”-19 16.662 6.41/2”-14 20.955 8.23/4”-14 26.441 9.51”-11 33.249 10.41(1/4)''-11 41.91 12.7美制圆锥管螺纹（NPT）1/8”-27 10.24 41/4”-18 13.60 43/8”-18 17.04 4.321/2”-14 21.22 4.483/4”-14 26.57 4.751”-11(1/2)” 33.22 4.61(1/4)”-11.5 41.96 4.832007-4-20 16:33评论(7)3/8-16 0.3643 0.3737 0.3287 0.3331 0.2970 8.40 8.44(0.375-16) 9.2532 9.4920 8.3490 8.4607 7.54387/16-14 0.4258 0.4361 0.3850 0.3897 0.3485 9.83 9.87(0.4375-14) 10.8153 11.0769 9.7790 9.8984 8.85191/2-13 0.4876 0.4985 0.4435 0.4485 0.4041 11.34 11.38(0.50-13) 12.3850 12.6619 11.2649 11.3919 10.26419/16-12 0.5495 0.5609 0.5016 0.5068 0.4587 12.80 12.84(0.5625-12) 13.9573 14.2469 12.7406 12.8727 11.65105/8-11 0.6113 0.6234 0.5589 0.5644 0.5119 14.27 14.32 (0.625-11) 15.5270 15.8344 14.1961 14.3358 13.00233/4-10 0.7353 0.7482 0.6773 0.6832 0.6255 17.28 17.33 (0.750-10) 18.6766 19.0043 17.2034 17.3533 15.88777/8-9 0.8592 0.8731 0.7946 0.8009 0.7368 20.27 20.32(0.875-9) 21.8237 22.1767 20.1828 20.3429 18.71471"-8 0.9830 0.9980 0.9100 0.9168 0.8446 23.22 23.27(1.000-8) 24.9682 25.3492 23.1140 23.2867 21.45281.螺胚直径指滚丝前的尺寸，数值为依经验公式计算而得，在实践中需验证。
公制英制美制螺纹对照表螺纹标准手册
G3/4 1.814 24.1 31 (14) ZG1/2 1.814 17.9 29 (14) G1 2.309 30.3 37 (11) ZG3/4 1.814 23.2 31 (14) G1-1/4 2.309 38.9 40 (11) G1 2.309 29.2 37 (11) G1-1/2 2.309 44.8 42 (11) 1-1/4 2.309 37.7 40 (11) G2 2.309 56.6 44 (11) ZG1-1/2 2.309 43.5 42 (11) ZG2 2.309 55.0 44 (11) 应该是1"7/16-12UN（F）吧 是美制螺纹的一种标注，1-7/16表示螺纹尺寸理论大径为25.4*23/16=36.5125 -12表示每英寸12牙。 UN（F）表示粗牙螺纹 查表数据为：大径36.467，中径34.943，小径33.947（外螺纹尺寸） 大径36.513，中径35.331，小径34.671（内螺纹） 实际加工时：螺纹外径车到36.32mm（36.178～36.466 ），螺距为2.1167（外螺纹） 车到33.65mm 螺纹孔径车到33.50mm（34.214～34.671），螺距为2.1167（内螺纹） 车到36.84mm
公制英制美制螺纹对照表螺纹标准手册
公制英制美制螺纹对照表螺纹标准手册 常用规格（公制） M1.2×0.25M2.5×0.45M6×0.75M10×0.75 M1.4×0.3M2.6×0.45M6×1M10×1 M1.6×0.35M3×0.5M7×0.75M10×1.25 M1.7×0.25M3×0.6M7×1M10×1.5 M1.7×0.35M3.5×0.6M8×0.75M11×1 M1.8×0.35M4×0.5M8×1M11×1.5 M2×0.4M4×0.7M8×1.25M12×1 M2.2×0.45M5×0.5M9×1M12×1.25 M2.3×0.45M5×0.8M9×1.25M12×1.5 常用规格（美制） 0-80UNF 5-40UNC 10-32UNF 5/16〃-32UNEF 1-64UNC 5-44UNV 12-24UNC 3/8〃-16UNC 1-72UNF 6-32UNC 12-28UNF 3/8〃-24UNF 2-56UNC 6-40UNF 12-32UNEF 3/8〃-32UNEF 2-64UNF 5/32〃-32UNC 1/4〃-20UNC 7/16〃-14UNC 3-48UNC 8-32UNC 1/4〃-28UNF 7/16〃-20UNF 3-56UNF 8-36UNF 1/4〃-32UNEF 7/16〃-28UNEF 4-40UNC 3/16〃-24UNC 5/16〃-18UNC 1/2〃-13UNC 4-48UNF 10-24UNC 5/16〃-24UNF 1/2〃-20UNF 常用规格（英制） 1/8〃-40 1/2〃-12 1〃-8 2〃-4.5 5/32〃-32 9/16〃-12 1-1/8〃-7 2-1/8〃-4 3/16〃-24 5/8〃-11 1-1/4〃-7 2-1/4〃-4 7/32〃-24 11/16〃-11 1-3/8〃-6 2-1/2〃-4 1/4〃-20 3/4〃-16 1-1/2〃-6 2-3/4〃-4 5/16〃-18 13/16〃-10 1-5/8〃-5 3-1/4〃-4 3/8〃-16 7/8〃-9 1-1/4〃-5 3-1/2〃-4 7/16〃-14 15/16〃-9 1-7/8〃-4.5 3-3/4〃-4 4〃-4 英制管螺纹对照表英制锥管螺纹对照表 公称直径螺距底孔直径底孔深度公称直径螺距底孔直径底孔深度 G1/4 1.337 11.4 20 (19) ZG1/8 0.907 8.1 15 (28) G3/8 1.337 14.9 24 (19) ZG1/4 1.337 10.8 20 (19)
英美制标准螺纹尺寸表
最大最小最小1最大最小公差范圍最小最大2A 0.00050.05950.0563…0.05140.04960.00180.04462B 0.04650.05143A 0.00000.06000.0568…0.05190.05060.00130.04513B 0.04650.05142A 0.00060.07240.0686…0.06230.06030.00200.05382B 0.05610.06233A 0.00000.07300.0692…0.06290.06140.00150.05443B 0.05610.06232A 0.00060.07240.0689…0.06340.06150.00190.05592B 0.05800.06353A 0.00000.07300.0695…0.06400.06260.00140.05653B 0.05800.06352A 0.00060.08540.0813…0.07380.07170.00210.06422B 0.06670.07373A 0.00000.08600.0819…0.07440.07280.00160.06483B 0.06670.07372A 0.00060.08540.0816…0.07530.07330.00200.06682B 0.06910.07533A 0.00000.08600.0822…0.07590.07440.00150.06743B 0.06910.07532A 0.00070.09830.0938…0.08480.08250.00230.07342B 0.07640.08453A 0.00000.09900.0945…0.08550.08380.00170.07413B 0.07640.08452A 0.00070.09830.0942…0.08670.08450.00220.07712B 0.07970.08653A 0.00000.09900.0949…0.08740.08580.00160.07783B 0.07970.08652A 0.00080.11120.1061…0.09500.09250.00250.08142B 0.08490.09393A 0.00000.11200.1069…0.09580.09390.00190.08223B 0.08490.09392A 0.00070.11130.1068…0.09780.09540.00240.08642B 0.08940.09683A 0.00000.11200.1075…0.09850.09670.00180.08713B 0.08940.09682A 0.00080.12420.1191…0.10800.10540.00260.09442B 0.09790.10623A 0.00000.12500.1199…0.10880.10690.00190.09523B 0.09790.10622A 0.00070.12430.1195…0.10950.10700.00250.09722B 0.10040.10793A 0.00000.12500.1202…0.11020.10830.00190.09793B 0.10040.10792A 0.00080.13720.1312…0.11690.11410.00280.10002B 0.10400.1143A 0.00000.13800.1320…0.11770.11560.00210.10083B 0.10400.11402A 0.00080.13720.1321…0.12100.11840.00260.10742B 0.1110.1193A 0.00000.13800.1329…0.12180.11980.00200.10823B 0.11100.11862A 0.00090.16310.1571…0.14280.13990.00290.12592B 0.1300.1393A 0.00000.16400.1580…0.14370.14150.00220.12683B 0.13000.13892A 0.00080.16320.1577…0.14520.14240.00280.13012B 0.1340.1423A0.00000.16400.1585…0.14600.14390.00210.13093B0.13400.1416等級允許偏差角最大等級2-56/0.086-562-64/0.086-643-48/0.099-483-56/0.099-560-80/0.060-801-64/0.073-641-72/0.073-726-32/0.138-326-40/0.138-408-32/0.164-328-36/0.164-364-40/0.112-404-48/0.112-485-40/0.125-405-44/0.125-44UNF UNC UNF UNC UNF UNC UNF UNC UNF UNC UNF UNC UNF UNC UNF最大最小最小1最大最小公差范圍最小最大等級允許偏差角最大等級2A 0.00100.18900.1818…0.16190.15860.00330.13942B 0.1450.1563A 0.00000.19000.1828…0.16290.16040.00250.14043B 0.14500.15552A 0.00090.18910.1831…0.16880.16580.00300.15192B 0.1560.1643A 0.00000.19000.1840…0.16970.16740.00230.15283B 0.15600.16412A 0.00100.21500.2078…0.18790.18450.00340.16542B 0.1710.1813A 0.00000.21600.2088…0.18890.18630.00260.16643B 0.17100.18072A 0.00100.21500.2085…0.19180.18860.00320.17242B 0.1770.1863A 0.00000.21600.2095…0.19280.19040.00240.17343B 0.17700.18572A 0.00090.21510.2091…0.19480.19170.00310.17792B 0.1820.1903A 0.00000.21600.2100…0.19570.19330.00240.17883B 0.18200.18951A 0.00110.24890.2367…0.21640.21080.00560.18941B 0.1960.2072A 0.00110.24890.24080.23670.21640.21270.00370.18942B 0.1960.2073A 0.00000.25000.2419…0.21750.21470.00280.19053B 0.19600.20671A 0.00100.24900.2392…0.22580.22080.00500.20641B 0.2110.2202A 0.00100.24900.2425…0.22580.22250.00330.20642B 0.2110.2203A 0.00000.25000.2435…0.22680.22430.00250.20743B 0.21100.21902A 0.00100.24900.2430…0.22870.22550.00320.21182B 0.2160.2243A 0.00000.25000.2440…0.22970.22730.00240.21283B 0.21600.22291A 0.00120.31130.2982…0.27520.26910.00610.24521B 0.2520.2652A 0.00120.31130.30260.29820.27520.27120.00400.24522B 0.2520.2653A 0.00000.31250.3038…0.27640.27340.00300.24643B 0.25200.26302A 0.00120.31130.3032…0.27880.27480.00400.25182B 0.2580.2703A 0.00000.31250.3044…0.28000.27700.00300.25303B 0.25800.26801A 0.00110.31140.3006…0.28430.27880.00550.26181B 0.2670.2772A 0.00110.31140.3042…0.28430.28060.00370.26182B 0.2670.2773A 0.00000.31250.3053…0.28540.28270.00270.26293B 0.26700.27542A 0.00100.31150.3050…0.28830.28490.00340.26892B 0.2740.2823A 0.00000.31250.3060…0.28930.28670.00260.26993B 0.27400.28072A 0.00100.31160.3055…0.29120.28800.00320.27432B 0.2790.2863A0.00000.31250.3065…0.29220.28980.00240.27533B0.27900.284712-32/0.216-321/4-20/0.250-201/4-28/0.250-281/4-32/0.250-3210-24/0.190-2410-32/0.190-3212-24/0.216-2412-28/0.216-285/16-32/0.3125-325/16-18/0.3125-185/16-20/0.3125-205/16-24/0.3125-245/16-28/0.3125-28UNC UNF UNC UNF UNC UN UNF UN UNEF UNCUNF UNEF UNEF最大最小最小1最大最小公差范圍最小最大等級允許偏差角最大等級1A 0.00130.37370.3595…0.33310.32660.00650.29921B 0.3070.3212A 0.00130.37370.36430.35950.33310.32870.00440.29922B 0.3070.3213A 0.00000.37500.3656…0.33440.33110.00330.30053B 0.30700.31822A 0.00120.37380.3657…0.34130.33720.00410.31432B 0.3210.3323A 0.00000.37500.3669…0.34250.33940.00310.31553B 0.32100.32971A 0.00110.37390.3631…0.34680.34110.00570.32431B 0.3300.3402A 0.00110.37390.3667…0.34680.34300.00380.32432B 0.3300.3403A 0.00000.37500.3678…0.34790.34500.00290.32543B 0.33000.33722A 0.00110.37390.3674…0.35070.34710.00360.33132B 0.3360.3453A 0.00000.37500.3685…0.35180.34910.00270.33243B 0.33600.34262A 0.00100.37400.3680…0.35370.35030.00340.33682B 0.3410.3493A 0.00000.37500.3690…0.35470.35220.00250.33783B 0.34100.34691A 0.00140.43610.4206…0.38970.38260.00710.35111B 0.3600.3762A 0.00140.43610.42580.42060.38970.38500.00470.35112B 0.3600.3763A 0.00000.43750.4272…0.39110.38760.00350.35253B 0.36000.37172A 0.00140.43610.4267…0.39550.39090.00460.36162B 0.3700.3843A 0.00000.43750.4281…0.39690.39350.00340.36303B 0.37000.38001A 0.00130.43620.4240…0.40370.39750.00620.37671B 0.3830.3952A 0.00130.43620.4281…0.40370.39950.00420.37672B 0.3830.3953A 0.00000.43750.4294…0.40500.40190.00310.37803B 0.38300.39162A 0.00110.43640.4299…0.41320.40960.00360.39382B 0.3990.4073A 0.00000.43760.4310…0.41430.41160.00270.39493B 0.39900.40512A 0.00100.43650.4305…0.41620.41280.00340.39932B 0.4040.4113A 0.00000.43750.4315…0.41720.41470.00250.40033B 0.40400.40941A 0.00150.49850.4822…0.44850.44110.00740.40691B 0.4170.4342A 0.00150.49850.48760.48220.44850.44350.00500.40692B 0.4170.4343A 0.00000.50000.4891…0.45000.44630.00370.40843B 0.41700.42842A 0.00140.49860.4892…0.45800.45330.00470.42412B 0.4320.4463A 0.00000.50000.4906…0.45940.45590.00350.42553B 0.43200.44191A 0.00130.49870.4865…0.46620.45980.00640.43921B 0.4460.4572A 0.00130.49870.4906…0.46620.46190.00430.43922B 0.4460.4573A0.00000.50000.4919…0.46750.46430.00320.44053B0.44600.45373/8-16/0.375-163/8-20/0.375-203/8-24/0.375-247/16-20/0.4375-207/16-28/0.4375-287/16-32/0.4375-321/2-13/0.500-133/8-28/0.375-283/8-32/0.375-327/16-14/0.4375-147/16-16/0.4375-161/2-16/0.500-161/2-20/0.500-20UN UNEF UNC UN UNC UN UNF UN UNFUNF UNEF UN UNC最大最小最小1最大最小公差范圍最小最大等級允許偏差角最大等級2A 0.00110.49890.4924…0.47570.47200.00370.45632B 0.4610.4703A 0.00000.50000.4935…0.47680.47400.00280.45743B 0.46100.46762A 0.00100.49900.4930…0.47870.47520.00350.46182B 0.4660.4743A 0.00000.50000.4940…0.47970.47710.00260.46283B 0.46600.47191A 0.00160.56090.5437…0.50680.49900.00780.46171B 0.4720.4902A 0.00160.56090.54950.54370.50680.50160.00520.46172B 0.4720.4903A 0.00000.56250.5511…0.50840.50450.00390.46333B 0.47200.48432A 0.00140.56110.5517…0.52050.51580.00470.48662B 0.4950.5093A 0.00000.56250.5531…0.52190.51840.00350.48803B 0.49500.50401A 0.00140.56110.5480…0.52500.51820.00680.49501B 0.5020.5152A 0.00140.56110.5524…0.52500.52050.00450.49502B 0.5020.5153A 0.00000.56250.5538…0.52640.52300.00340.49643B 0.50200.51062A 0.00130.56120.5531…0.52870.52450.00420.50172B 0.5080.5203A 0.00000.56260.5544…0.53000.52680.00320.50303B 0.50800.51622A 0.00120.56130.5541…0.53420.53030.00390.51172B 0.5170.5273A 0.00000.56250.5553…0.53540.53250.00290.51293B 0.5170.52442A 0.00110.56140.5549…0.53820.53450.00370.51882B 0.5240.5323A 0.00000.56250.5560…0.53930.53650.00280.51993B 0.52400.53012A 0.00100.56150.5555…0.54120.53770.00350.52432B 0.5290.5363A 0.00000.56250.5565…0.54220.53960.00260.52533B 0.52900.53441A 0.00160.62340.6052…0.56440.55610.00830.51521B 0.5270.5462A 0.00160.62340.61130.60520.56440.55890.00560.51522B 0.5270.5463A 0.00000.62500.6129…0.56600.56190.00410.51683B 0.52700.53912A 0.00160.62340.6120…0.56930.56390.00540.52422B 0.5350.5533A 0.00000.62500.6136…0.57090.56680.00410.52583B 0.53500.54632A 0.00140.63260.6142…0.58300.57820.00480.54912B 0.5570.5713A 0.00000.62500.6156…0.58440.58080.00360.55053B 0.55700.56621A 0.00140.62360.6105…0.58750.58050.00700.55751B 0.5650.5782A 0.00140.62360.6149…0.58750.58280.00470.55752B 0.5650.5783A0.00000.62500.6163…0.58890.58540.00350.55893B0.5650.57309/16-12/0.5625-129/16-16/0.5625-169/16-18/0.5625-189/16-20/0.5625-201/2-28/0.500-281/2-32/0.500-325/8-12/0.625-125/8-16/0.625-165/8-18/0.625-189/16-24/0.5625-249/16-28/0.5625-289/16-32/0.5625-325/8-11/0.625-11UNEF UN UNEF UN UN UNC UNC UN UNF UN UN UN UNF最大最小最小1最大最小公差范圍最小最大等級允許偏差角最大等級2A 0.00130.62370.6156…0.59120.58690.00430.56422B 0.5710.5823A 0.00000.62500.6169…0.59250.58930.00320.56553B 0.57100.57872A 0.00120.62380.6166…0.59670.59270.0040057422B 0.5800.5903A 0.00000.62500.6178…0.59790.59490.00300.57543B 0.58000.58692A 0.00110.62390.6174…0.60070.59690.00380.58132B 0.5860.5953A 0.00000.62500.6185…0.60180.59900.00280.58243B 0.58600.59262A 0.00110.62390.6179…0.60360.60000.00360.58672B 0.5910.5903A 0.00000.62500.6190…0.60470.60200.00270.58783B 0.59100.59692A 0.00160.68590.6745…0.63180.62640.00540.58672B 0.5970.6153A 0.00000.68750.6761…0.63340.62930.00410.58833B 0.5970.60852A 0.00140.68610.6767…0.64550.64070.00480.61162B 0.6200.6343A 0.00000.68750.6781…0.64690.64330.00360.61303B 0.62000.62842A 0.00130.68820.6781…0.65370.64940.00430.62672B 0.6330.6453A 0.00000.68750.6794…0.65500.65180.00320.62803B 0.63300.64122A 0.00120.68630.6791…0.65920.65520.00400.63672B 0.6420.6523A 0.00000.68750.6803…0.66040.65740.00300.63793B 0.64200.64942A 0.00110.68640.6799…0.66320.65940.00380.64382B 0.6490.6573A 0.00000.68750.6810…0.66430.66150.00280.64493B 0.64900.65512A 0.00110.68640.6804…0.66610.66250.00380.64922B 0.6540.6613A 0.00000.68750.6815…0.66720.66450.00270.65033B 0.65400.65941A 0.00180.74820.7288…0.68320.67440.00880.62911B 0.6420.6632A 0.00180.74820.73530.72880.68320.67730.00590.62912B 0.6420.6633A 0.00000.75000.7371…0.68500.68060.00440.63093B 0.64200.65452A 0.00170.74830.7369…0.69420.68870.00550.64912B 0.6600.6783A 0.00000.75000.7386…0.69590.69180.00410.65083B 0.66000.67071A 0.00150.74850.7343…0.70790.70040.00750.67401B 0.6820.6962A 0.00150.74850.7391…0.70790.70290.00500.67402B 0.6820.6963A 0.00000.75000.7406…0.70940.70560.00380.67553B 0.68200.69082A 0.00130.74870.7406…0.71620.71180.00440.68922B 0.6960.7073A0.00000.75000.7419…0.71750.71420.00330.69053B0.69600.70375/8-20/0.625-2011/16-16/0.6875-1611/16-20/0.6875-2011/16-24/0.6875-2411/16-28/0.6875-285/8-24/0.625-245/8-28/0.625-285/8-32/0.625-3211/16-12/0.6875-123/4-20/0.750-2011/16-32/0.6875-323/4-10/0.750-103/4-12/0.750-123/4-16/0.750-16UNEF UN UN UN UN UN UNC UN UNF UN UN UNEF UN UN最大最小最小1最大最小公差范圍最小最大等級允許偏差角最大等級2A 0.00120.74880.7423…0.72560.72180.00380.70622B 0.7110.7203A 0.00000.75000.7435…0.72680.72390.00290.70743B 0.71100.71762A 0.00110.74890.7429…0.72860.72500.00360.71172B 0.7160.7243A 0.00000.75000.7440…0.72970.72700.00270.71283B 0.71600.72192A 0.00170.81080.7994…0.75670.75120.00550.71162B 0.7220.7403A 0.00000.81250.8011…0.75840.75430.00410.71333B 0.72200.73292A 0.00150.81100.8016…0.77040.76550.00490.73652B 0.7450.7593A 0.00000.81250.8031…0.77190.76830.00360.73803B 0.74500.75332A 0.00130.81120.8031…0.77870.77430.00440.75172B 0.7580.7703A 0.00000.81250.8044…0.78000.77670.00330.75303B 0.75800.76622A 0.00120.81130.8048…0.78810.78430.00380.76872B 0.7740.7823A 0.00000.81250.8060…0.78930.78640.00290.76993B 0.77400.78012A 0.00110.81140.8054…0.79110.78750.00360.77422B 0.7790.7863A 0.00000.81250.8065…0.79220.78950.00270.77533B 0.77900.78441A 0.00190.87310.8523…0.80090.79140.00950.74081B 0.7550.7782A 0.00190.87310.85920.85230.80090.79460.00630.74082B 0.7550.7783A 0.00000.87500.8611…0.80280.79810.00470.74273B 0.75500.76812A 0.00170.87330.8619…0.81920.81370.00550.77412B 0.7850.8033A 0.00000.87500.8636…0.82090.81680.00410.77583B 0.78500.79481A 0.00160.87340.8579…0.82700.81890.00810.78841B 0.7980.8142A 0.00160.87340.8631…0.82700.82160.00540.78842B 0.7980.8143A 0.00000.87500.8647…0.82860.82450.00410.79003B 0.79800.80682A 0.00150.87350.8641…0.83290.82800.00490.79002B 0.8070.8213A 0.00000.87500.8656…0.83440.83080.00360.80053B 0.80700.81582A 0.00130.87370.8656…0.84120.83680.00440.81422B 0.8210.8323A 0.00000.87500.8669…0.84250.83920.00330.81553B 0.82100.82872A 0.00120.87380.8673…0.85060.84680.00380.83122B 0.8360.8453A 0.00000.87500.8685…0.85180.84890.00290.83243B 0.83600.84262A 0.00110.87390.8679…0.85360.85000.00360.83672B 0.8410.8493A0.00000.87500.8690…0.85470.85200.00270.83783B0.84100.84693/4-28/0.750-283/4-32/0.750-3213/16-12/0.8125-127/8-9/0.875-97/8-12/0.875-127/8-14/0.875-147/8-16/0.875-1613/16-16/0.8125-1613/16-20/0.8125-2013/16-28/0.8125-2813/16-32/0.8125-327/8-20/0.875-207/8-28/0.875-287/8-32/0.875-32UN UNEF UN UN UN UN UN UNEF UN UNUNC UN UNF UN最大最小最小1最大最小公差范圍最小最大等級允許偏差角最大等級2A 0.00170.93580.9244…0.88170.87600.00570.83662B 0.8470.8653A 0.00000.93750.9261…0.88340.87930.00410.83833B 0.84700.85752A 0.00150.93600.9266…0.89540.89040.00500.86152B 0.8700.8843A 0.00000.93750.9281…0.89690.89320.00370.86303B 0.87000.87832A 0.00140.93610.9280…0.90360.89910.00450.87662B 0.8830.8953A 0.00000.93750.9294…0.90500.90160.00340.87803B 0.88300.89122A 0.00120.93630.9298…0.91310.90910.00400.89372B 0.8990.9073A 0.00000.93750.9310…0.91430.91130.00300.89493B 0.89900.90512A 0.00110.93640.9304…0.91610.91230.00380.89922B 0.9040.9113A 0.00000.93750.9315…0.91720.91440.00280.90033B 0.90400.90941A 0.00200.99800.9755…0.91680.90670.01010.84921B 0.8650.8902A 0.00200.99800.98300.97550.91680.91000.00680.84922B 0.8650.8903A 0.0000 1.00000.9850…0.91880.91370.00510.85123B 0.86500.87971A 0.00180.99820.9810…0.94410.93530.00880.89901B 0.9100.9282A 0.00180.99820.9868…0.94410.93820.00590.89902B 0.9100.9283A 0.0000 1.00000.9886…0.94590.94150.00440.90083B 0.91000.91981A 0.00170.99830.9828…0.95190.94350.00840.91321B 0.9230.9382A 0.00170.99830.9880…0.95190.94630.00560.91322B 0.9230.9383A 0.0000 1.00000.9897…0.95360.94940.00420.91493B 0.92300.93162A 0.00150.99850.9891…0.95790.95290.00500.92402B 0.9320.9463A 0.0000 1.00000.9906…0.95940.95570.00370.92553B 0.93200.94082A 0.00140.99860.9905…0.96610.96160.00450.93912B 0.9460.9573A 0.0000 1.00000.9919…0.96750.96410.00340.94053B 0.94600.95372A 0.00120.99880.9923…0.97560.97160.00400.95622B 0.9610.9703A 0.0000 1.00000.9935…0.97680.97380.00300.95743B 0.96100.96762A 0.00110.99890.9929…0.97860.97480.00380.96172B 0.9660.9743A 0.0000 1.00000.9940…0.97970.97690.00280.96283B 0.96600.97192A 0.0020 1.0605 1.0455…0.97930.97250.00680.91172B 0.9270.9523A0.00001.06251.0475…0.98130.97620.00510.91373B0.92700.942215/16-16/0.9375-1615/16-20/0.9375-2015/16-28/0.9375-2815/16-32/0.9375-3215/16-12/0.9375-121-20/1.000-201-28/1.000-281-32/1.000-321-1/16-8/1.0625-81-8/1.000-81-12/1.000-121-14/1.000-141-16/1.000-16UN UNCUNFUNS(5)UN UN UNEF UN UN UNEF UN UN UN最大最小最小1最大最小公差范圍最小最大等級允許偏差角最大等級2A 0.0017 1.0608 1.0494… 1.0067 1.00100.00570.96162B 0.9720.9903A 0.0000 1.0625 1.0511… 1.0084 1.00420.00420.96333B 0.97200.98232A 0.0015 1.0610 1.0516… 1.0204 1.01540.00500.98652B 0.995 1.0093A 0.0000 1.0625 1.0531… 1.0219 1.01820.00370.98803B 0.9950 1.00332A 0.0014 1.0611 1.0524… 1.0250 1.02030.00470.99502B 1.002 1.0153A 0.0000 1.0625 1.0538… 1.0264 1.02280.00360.99643B 1.0020 1.01052A 0.0014 1.0611 1.0530… 1.0286 1.02410.0045 1.00162B 1.008 1.0203A 0.0000 1.0625 1.0544… 1.0300 1.02660.0034 1.00303B 1.0080 1.01622A 0.0012 1.0613 1.0548… 1.0381 1.03410.0040 1.01872B 1.024 1.0323A 0.0000 1.0625 1.0560… 1.0393 1.03630.0030 1.01993B 1.0240 1.03011A 0.0022 1.1228 1.0982… 1.0300 1.0191 1.01090.95271B 0.9700.9982A 0.0022 1.1228 1.1064 1.0982 1.0300 1.02280.00720.95272B 0.9700.9983A 0.0000 1.1250 1.1086… 1.0322 1.02680.00540.95493B 0.97000.98752A 0.0021 1.1229 1.1079 1.1004 1.0417 1.03480.00690.97412B 0.990 1.0153A 0.0000 1.1250 1.1100… 1.0438 1.03860.00520.97623B 0.9900 1.00471A 0.0018 1.1232 1.1060… 1.0691 1.06010.0090 1.02401B 1.035 1.0532A 0.0018 1.1232 1.1118… 1.0691 1.06310.0060 1.02402B 1.035 1.0533A 0.0000 1.1250 1.1136… 1.0709 1.06640.0045 1.02583B 1.0350 1.04482A 0.0015 1.1235 1.1141… 1.0829 1.07790.0050 1.04902B 1.057 1.0713A 0.0000 1.1250 1.1156… 1.0844 1.08070.00370.05053B 1.0570 1.06582A 0.0014 1.1236 1.1149… 1.0875 1.08280.0047 1.05752B 1.065 1.0783A 0.0000 1.1250 1.1163… 1.0889 1.08530.0036 1.05893B 1.0650 1.07302A 0.0014 1.1236 1.1155… 1.0911 1.08660.0045 1.06412B 1.071 1.0823A 0.0000 1.1250 1.1169… 1.0925 1.08910.0034 1.06553B 1.0710 1.07872A 0.0012 1.1238 1.1173… 1.1006 1.09660.0040 1.08122B 1.086 1.0953A 0.0000 1.1250 1.1185… 1.1018 1.09880.0030 1.08243B 1.0860 1.09262A 0.0021 1.1854 1.1704… 1.1042 1.09720.0070 1.03662B 1.052 1.0773A 0.0000 1.1875 1.1725… 1.1063 1.10110.0052 1.03873B 1.0520 1.06722A 0.0017 1.1858 1.1744… 1.1317 1.12590.0058 1.08662B 1.097 1.1153A0.00001.18751.1761…1.13341.12910.0043 1.08833B1.0970 1.10731-1/16-28/1.0625-281-1/8-7/1.125-71-1/8-8/1.125-81-1/8-12/1.125-121-1/16-12/1.0625-121-1/16-16/1.0625-161-1/16-18/1.0625-181-1/16-20/1.0625-201-3/16-8/1.1875-81-3/16-12/1.1875-121-1/8-16/1.125-161-1/8-18/1.125-181-1/8-20/1.125-201-1/8-28/1.125-28UN UN UNEF UN UN UNEF UN UN UN UNC UN UNF UN UN最大最小最小1最大最小公差范圍最小最大等級允許偏差角最大等級2A 0.0015 1.1860 1.1766… 1.1454 1.14030.0051 1.11152B 1.120 1.1343A 0.0000 1.1875 1.1781… 1.1469 1.14310.0038 1.11303B 1.1200 1.12832A 0.0015 1.1860 1.1773… 1.1499 1.14500.0049 1.11992B 1.127 1.1403A 0.0000 1.1875 1.1788… 1.1514 1.14780.0036 1.12143B 1.1270 1.13552A 0.0014 1.1861 1.1780… 1.1536 1.14890.0047 1.12662B 1.133 1.1453A 0.0000 1.1875 1.1794… 1.1550 1.15150.0035 1.12803B 1.1330 1.14122A 0.0012 1.1863 1.1798… 1.1631 1.15900.0041 1.14372B 1.149 1.1573A 0.0000 1.1875 1.1810… 1.1643 1.16120.0031 1.14493B 1.1490 1.15511A 0.0022 1.2478 1.2232… 1.1550 1.14390.0111 1.07771B 1.095 1.1232A 0.0022 1.2478 1.2314 1.2232 1.1550 1.14760.0074 1.07772B 1.095 1.1233A 0.0000 1.2500 1.2336… 1.1572 1.15170.0055 1.07993B 1.0950 1.11252A 0.0021 1.2479 1.2329 1.2254 1.1667 1.15970.0070 1.09912B 1.115 1.1403A 0.0000 1.2500 1.2350… 1.1688 1.16350.0053 1.10123B 1.1150 1.12971A 0.0018 1.2482 1.2310… 1.1941 1.18490.0092 1.14901B 1.160 1.1782A 0.0018 1.2482 1.2368… 1.1941 1.18790.0062 1.14902B 1.160 1.1783A 0.0000 1.2500 1.2386… 1.1959 1.19130.0046 1.15083B 1.1600 1.16982A 0.0015 1.2485 1.2391… 1.2079 1.20280.0051 1.17402B 1.182 1.1963A 0.0000 1.2500 1.2406… 1.2094 1.20560.0038 1.17553B 1.1820 1.19082A 0.0015 1.2485 1.2398… 1.2124 1.20750.0049 1.18242B 1.190 1.2033A 0.0000 1.2500 1.2413… 1.2139 1.21030.0036 1.18393B 1.1900 1.19802A 0.0014 1.2486 1.2405… 1.2161 1.21140.0047 1.18912B 1.196 1.2073A 0.0000 1.2500 1.2419… 1.2175 1.21400.0035 1.19053B 1.1960 1.20372A 0.0012 1.2488 1.2423… 1.2256 1.22150.0041 1.20622B 1.211 1.2203A 0.0000 1.2500 1.2435… 1.2268 1.22370.0031 1.20743B 1.2110 1.21762A 0.0021 1.3104 1.2954… 1.2292 1.22210.0071 1.16162B 1.177 1.2023A 0.0000 1.3125 1.2975… 1.2313 1.22600.0053 1.16373B 1.1770 1.19222A 0.0017 1.3108 1.2994… 1.2567 1.25090.0058 1.21162B 1.222 1.2403A 0.0000 1.3125 1.3011… 1.2584 1.25410.0043 1.21333B 1.2220 1.23232A 0.0015 1.3110 1.3016… 1.2704 1.26530.0051 1.23652B 1.245 1.2593A0.00001.31251.3031…1.27191.26810.0038 1.23803B1.2450 1.25331-3/16-16/1.1875-161-3/16-18/1.1875-181-1/4-12/1.250-121-1/4-16/1.250-161-1/4-18/1.250-181-1/4-20/1.250-201-3/16-20/1.1875-201-3/16-28/1.1875-281-1/4-7/1.250-71-1/4-8/1.250-81-1/4-28/1.250-281-5/16-8/1.3125-81-5/16-12/1.3125-121-5/16-16/1.3125-16UN UN UNC UN UN UNEF UN UN UN UNUNF UN UNEF UN最大最小最小1最大最小公差范圍最小最大等級允許偏差角最大等級2A 0.0015 1.3110 1.3023… 1.2749 1.27000.0049 1.24492B 1.252 1.2653A 0.0000 1.3125 1.3038… 1.2764 1.27280.0036 1.24643B 1.2520 1.26052A 0.0014 1.3111 1.3030… 1.2786 1.27390.0047 1.25162B 1.258 1.2703A 0.0000 1.3125 1.3044… 1.2800 1.27650.0035 1.25303B 1.2580 1.26622A 0.0012 1.3113 1.3048… 1.2881 1.28400.0041 1.26872B 1.274 1.2823A 0.0000 1.3125 1.3060… 1.2893 1.28620.0031 1.26993B 1.2740 1.28011A 0.0024 1.3726 1.3453… 1.2643 1.25230.0120 1.17421B 1.195 1.2252A 0.0024 1.3726 1.3544 1.3453 1.2643 1.25630.0080 1.17422B 1.195 1.2253A 0.0000 1.3750 1.3568… 1.2667 1.26070.0060 1.17663B 1.1950 1.21462A 0.0022 1.3728 1.3578 1.3503 1.2916 1.28440.0072 1.22402B 1.240 1.2653A 0.0000 1.3750 1.3600… 1.2938 1.28840.0054 1.22623B 1.2400 1.25471A 0.0019 1.3731 1.3559… 1.3190 1.30960.0094 1.27391B 1.285 1.3032A 0.0019 1.3731 1.3617… 1.3190 1.31270.0063 1.27392B 1.285 1.3033A 0.0000 1.3750 1.3636… 1.3209 1.31620.0047 1.27583B 1.2850 1.29482A 0.0015 1.3735 1.3641… 1.3329 1.32780.0051 1.29902B 1.307 1.3213A 0.0000 1.3750 1.3656… 1.3344 1.33060.0038 1.30053B 1.3070 1.31582A 0.0015 1.3735 1.3648… 1.3374 1.33250.0049 1.30742B 1.315 1.3283A 0.0000 1.3750 1.3663… 1.3389 1.33530.0036 1.30893B 1.3150 1.32302A 0.0014 1.3736 1.3655… 1.3411 1.33640.0047 1.31412B 1.321 1.3323A 0.0000 1.3750 1.3669… 1.3425 1.33900.0035 1.31553B 1.3210 1.32872A 0.0012 1.3738 1.3673… 1.3506 1.34650.0041 1.33122B 1.336 1.3453A 0.0000 1.3750 1.3685… 1.3518 1.34870.0031 1.33243B 1.3360 1.34262A 0.0024 1.4351 1.4169… 1.3268 1.31880.0080 1.23672B 1.257 1.2883A 0.0000 1.4375 1.4193… 1.3292 1.32320.0060 1.23913B 1.2570 1.27712A 0.0022 1.4353 1.4203… 1.3541 1.34690.0072 1.28652B 1.302 1.3273A 0.0000 1.4375 1.4225… 1.3563 1.35090.0054 1.28873B 1.3020 1.31722A 0.0018 1.4357 1.4243… 1.3816 1.37570.0059 1.33652B 1.347 1.3653A 0.0000 1.4375 1.4261… 1.3834 1.37900.0044 1.33833B 1.3470 1.35732A 0.0016 1.4359 1.4265… 1.3953 1.39010.0052 1.36142B 1.370 1.3843A0.00001.43751.4281…1.39691.39300.0039 1.36303B1.3700 1.37831-5/16-18/1.3125-181-5/16-20/1.3125-201-5/16-28/1.3125-281-3/8-6/1.375-61-3/8-20/1.375-201-3/8-28/1.375-281-7/16-6/1.4375-61-7/16-8/1.4375-81-3/8-8/1.375-81-3/8-12/1.375-121-3/8-16/1.375-161-3/8-18/1.375-181-7/16-12/1.4375-121-7/16-16/1.4375-16UN UNF UN UNEF UNEF UN UN UNC UNUN UN UN UN UN最大最小最小1最大最小公差范圍最小最大外螺紋内螺紋外 徑中 徑孔 徑等級允許偏差外徑倒角最大等級螺紋规格螺紋型式2A 0.0015 1.4360 1.4273… 1.3999 1.39490.0050 1.36992B 1.377 1.3903A 0.0000 1.4375 1.4288… 1.4014 1.39770.0037 1.37143B 1.3770 1.38552A 0.0014 1.4361 1.4280… 1.4036 1.39880.0048 1.37662B 1.383 1.3953A 0.0000 1.4375 1.4294… 1.4050 1.40140.0036 1.37803B 1.3830 1.39122A 0.0013 1.4362 1.4297… 1.4130 1.40880.0042 1.39362B 1.399 1.4073A 0.0000 1.4375 1.4310… 1.4143 1.41120.0031 1.39493B 1.3990 1.40511A 0.0024 1.4976 1.4703… 1.3893 1.37720.0121 1.29921B 1.320 1.3502A 0.0024 1.4976 1.4794 1.4703 1.3893 1.38120.0081 1.29922B 1.320 1.3503A 0.0000 1.5000 1.4818… 1.3917 1.38560.0061 1.30163B 1.3200 1.33962A 0.0022 1.4978 1.4828 1.4753 1.4166 1.40930.0073 1.34902B 1.365 1.3903A 0.0000 1.5000 1.4850… 1.4188 1.41330.0055 1.35123B 1.3650 1.37971A 0.0019 1.4981 1.4809… 1.4440 1.43440.0096 1.39891B 1.410 1.4282A 0.0019 1.4981 1.4867… 1.4440 1.43760.0064 1.39892B 1.410 1.4283A 0.0000 1.5000 1.4886… 1.4459 1.44110.0048 1.40083B 1.4100 1.41982A 0.0016 1.4984 1.4890… 1.4578 1.45260.0052 1.42392B 1.432 1.4463A 0.0000 1.5000 1.4906… 1.4594 1.45550.0039 1.42553B 1.4320 1.44082A 0.0015 1.4985 1.4898… 1.4624 1.45740.0050 1.43242B 1.440 1.4523A 0.0000 1.5000 1.4913… 1.4639 1.46020.0037 1.43393B 1.4400 1.44802A 0.0014 1.4986 1.4905… 1.4661 1.46130.0048 1.43912B 1.446 1.4573A 0.0000 1.5000 1.4919… 1.4675 1.46390.0036 1.44053B 1.4460 1.45372A 0.0013 1.4987 1.4922… 1.4755 1.47130.0042 1.45612B 1.461 1.4703A0.00001.50001.4935…1.47681.47370.0031 1.45743B1.4610 1.46761-1/2-20/1.500-201-1/2-28/1.500-281-7/16-28/1.4375-281-1/2-6/1.500-61-1/2-8/1.500-81-1/2-12/1.500-121-1/2-16/1.500-161-1/2-18/1.500-181-7/16-18/1.4375-181-7/16-20/1.4375-20UNEF UN UN UNEF UN UNUN UNC UN UNF角最小最小最大公差范圍0.05190.05420.00230.0600 0.05190.05360.00170.0600 0.06290.06550.00260.0730 0.06290.06480.00190.0730 0.06400.06650.00250.0730 0.06400.06590.00190.0730 0.07440.07720.00280.0860 0.07440.07650.00210.0860 0.07590.07860.00270.0860 0.07590.07790.00200.0860 0.08550.08850.00300.0990 0.08550.08770.00220.0990 0.08740.09020.00280.0990 0.08740.08950.00210.0990 0.09580.09910.00330.1120 0.09580.09820.00240.1120 0.09850.10160.00310.1120 0.09850.10080.00230.1120 0.10880.11210.00330.1250 0.10880.11130.00250.1250 0.11020.11340.00320.1250 0.11020.11260.00240.1250 0.11770.12140.00370.1380 0.11770.12040.00270.1380 0.12180.12520.00340.1380 0.12180.12430.00250.1380 0.14370.14750.00380.1640 0.14370.14650.00280.1640 0.14600.14960.00360.1640 0.14600.14870.00270.1640最小最大公差范圍角最小0.16290.16720.00430.1900 0.16290.16610.00320.1900 0.16970.17360.00390.1900 0.16970.17260.00290.1900 0.18890.19330.00440.2160 0.18890.19220.00330.2160 0.19280.19700.00420.2160 0.19280.19590.00310.2160 0.19570.19980.00410.2160 0.19570.19880.00310.2160 0.21750.22480.00730.2500 0.21750.22240.00490.2500 0.21750.22110.00360.2500 0.22680.23330.00650.2500 0.22680.23110.00430.2500 0.22680.23000.00320.2500 0.22970.23390.00420.2500 0.22970.23280.00310.2500 0.27640.28430.00790.3125 0.27640.28170.00530.3125 0.27640.28030.00390.3125 0.28000.28520.00570.3125 0.28000.28390.00390.3125 0.28540.29250.00710.3125 0.28540.29020.00480.3125 0.28540.28900.00360.3125 0.28930.29370.00440.3125 0.28930.29260.00330.3125 0.29220.29640.00420.3125 0.29220.29530.00310.3125最小最大公差范圍角最小0.33440.34290.00850.3750 0.33440.34010.00570.3750 0.33440.33870.00430.3750 0.34250.34790.00540.3750 0.34250.34650.00400.3750 0.34790.35530.00740.3750 0.34790.35280.00490.3750 0.34790.35160.00370.3750 0.35180.35640.00460.3750 0.35180.35530.00350.3750 0.35470.35910.00440.3750 0.35470.35800.00330.3750 0.39110.40030.00920.4375 0.39110.39720.00610.4375 0.39110.39570.00460.4375 0.39690.40280.00590.4375 0.39690.40140.00450.4375 0.40500.41310.00810.4375 0.40500.41040.00540.4375 0.40500.40910.00410.4375 0.41430.41890.00460.4375 0.41430.41780.00350.4375 0.41720.42160.00440.4375 0.41720.42050.00330.4375 0.45000.45970.00970.5000 0.45000.45650.00650.5000 0.45000.45480.00480.5000 0.45940.46550.00610.5000 0.45940.46400.00460.5000 0.46750.47590.00840.5000 0.46750.47310.00560.5000 0.46750.47170.00420.5000最小最大公差范圍角最小0.47680.48160.00480.5000 0.47680.48040.00360.5000 0.47970.48420.00450.5000 0.47970.48310.00340.5000 0.50840.51860.01020.5625 0.50840.51520.00680.5625 0.50840.51350.00510.5625 0.52190.52800.00610.5625 0.52190.52650.00460.5625 0.52640.53530.00890.5625 0.52640.53230.00590.5625 0.52640.53080.00440.5625 0.53000.53550.00550.5625 0.53000.53410.00410.5625 0.53540.54050.00510.5625 0.53540.53920.00380.5625 0.53930.54410.00480.5625 0.53930.54290.00360.5625 0.54220.54670.00450.5625 0.54220.54560.00340.5625 0.56600.57670.01070.6250 0.56600.57320.00720.6250 0.56600.57140.00540.6250 0.57090.57800.00710.6250 0.57090.57620.00530.6250 0.58440.59060.00620.6250 0.58440.58900.00460.6250 0.58890.59800.00910.6250 0.58890.59490.00600.6250 0.58890.59340.00450.6250最小最大公差范圍角最小0.59250.59810.00560.6250 0.59250.59670.00420.6250 0.59790.60310.00520.6250 0.59790.60180.00390.6250 0.60180.60670.00490.6250 0.60180.60550.00370.6250 0.60470.60930.00460.6250 0.60470.60820.00350.6250 0.63340.64050.00710.6875 0.63340.63870.00530.6875 0.64690.65310.00620.6875 0.64690.65150.00460.6875 0.65500.66060.00560.6875 0.65500.65920.00420.6875 0.66040.66560.00520.6875 0.66040.66430.00390.6875 0.66430.66920.00490.6875 0.66430.66800.00370.6875 0.66720.67180.00460.6875 0.66720.67070.00350.6875 0.68500.69650.01150.7500 0.68500.69270.00770.7500 0.68500.69070.00570.7500 0.69590.70310.00720.7500 0.69590.70130.00540.7500 0.70940.71920.00980.7500 0.70940.71590.00650.7500 0.70940.71430.00490.7500 0.71750.72320.00570.7500 0.71750.72180.00430.7500最小最大公差范圍角最小0.72680.73180.00500.7500 0.72680.73050.00370.7500 0.72970.73440.00470.7500 0.72970.73330.00360.7500 0.75840.76560.00720.8125 0.75840.76380.00540.8125 0.77190.77820.00630.8125 0.77190.77660.00470.8125 0.78000.78570.00570.8125 0.78000.78430.00430.8125 0.78930.79430.00500.8125 0.78930.79300.00370.8125 0.79220.79690.00470.8125 0.79220.79580.00360.8125 0.80280.81510.01230.8750 0.80280.81100.00820.8750 0.80280.80890.00610.8750 0.82090.82810.00720.8750 0.82090.82630.00540.8750 0.82860.83920.01060.8750 0.82860.83560.00700.8750 0.82860.83390.00530.8750 0.83440.84070.00630.8750 0.83440.83910.00470.8750 0.84250.84820.00570.8750 0.84250.84680.00430.8750 0.85180.85680.00500.8750 0.85180.85550.00370.8750 0.85470.85940.00470.8750 0.85470.85830.00360.8750。
国标 英标 美标螺纹规格表
G、RP（内） PF（日） 0.6403t 圆柱管螺纹（55°）上部H/6 下部H/6 削平ZG、R（外）、RC（内）、PT（外）、NPT（内）圆锥管螺纹（55°）上部H/6 下部H/6 削平Z 0.8t 布锥管螺纹（60°）上部0.033t下部0.033t BSP、BSPP=G 英制管螺纹（55°）上部H/6 下部H/6 削平UNC（粗）、UNF（细） 美制螺纹（60°） 上部H/8 下部H/4 削平BSW（粗）、BSF（细） 惠制螺纹（55°） 上部H/6 下部H/6 削平注意：美制与惠制螺纹均为紧固件类螺纹圆柱管螺纹公称直径为管子内径尺寸。
公制螺纹加工表内螺纹小径：D1=D-1.082532t外螺纹小径：d1=d-1.082532t公制螺纹 粗牙（60°）公制螺纹 细牙（60°）注意：底孔尺寸均为加工螺纹孔时专用尺寸。
深度尺寸均为加工螺纹孔时孔深度尺寸。
（规定为15倍螺距）G 英制圆柱管螺纹（55°）加工一览表小径：d1=d-1.2807tZG 英制锥管螺纹（55°）加工一览表小径：d=d-1.2807t注意：底孔尺寸均为加工螺纹孔时专用尺寸。
深度尺寸均为加工螺纹孔时孔深度尺寸。
（规定为15倍螺距）Z 圆锥管螺纹（布锥管螺纹） （60°）小径：d1=d-1.6t美制螺纹（UNC、UNF）参数表（60°）底孔尺寸均为加工螺纹孔时专用尺寸。
深度尺寸均为加工螺纹孔时孔深度尺寸。
（规定为15倍螺距）惠氏螺纹（BSW、BSF）参数表（55°）小径：d1=d-1.280655t注意：in为英寸符号，一英寸等于25.4毫米。
底孔尺寸均为加工螺纹孔时专用尺寸。
深度尺寸均为加工螺纹孔时光孔深度尺寸。
（规定为15倍螺距）惠氏螺纹为紧固件螺纹。
公称直径为螺纹大径。
螺纹详细尺寸规格表-国标英标美标
G、RP（内） PF（日） 0.6403t 圆柱管螺纹（55°）上部H/6 下部H/6 削平ZG、R（外）、RC（内）、PT（外）、NPT（内）圆锥管螺纹（55°）上部H/6 下部H/6 削平Z 0.8t 布锥管螺纹（60°）上部0.033t下部0.033t BSP、BSPP=G 英制管螺纹（55°）上部H/6 下部H/6 削平UNC（粗）、UNF（细） 美制螺纹（60°） 上部H/8 下部H/4 削平BSW（粗）、BSF（细） 惠制螺纹（55°） 上部H/6 下部H/6 削平注意：美制与惠制螺纹均为紧固件类螺纹圆柱管螺纹公称直径为管子内径尺寸。
公制螺纹加工表内螺纹小径：D1=D-1.082532t外螺纹小径：d1=d-1.082532t公制螺纹 粗牙（60°）公制螺纹 细牙（60°）深度尺寸均为加工螺纹孔时孔深度尺寸。
（规定为15倍螺距）G 英制圆柱管螺纹（55°）加工一览表小径：d1=d-1.2807tZG 英制锥管螺纹（55°）加工一览表小径：d=d-1.2807t注意：底孔尺寸均为加工螺纹孔时专用尺寸。
深度尺寸均为加工螺纹孔时孔深度尺寸。
（规定为15倍螺距）Z 圆锥管螺纹（布锥管螺纹） （60°）小径：d=d-1.6t美制螺纹（UNC、UNF）参数表（60°）底孔尺寸均为加工螺纹孔时专用尺寸。
深度尺寸均为加工螺纹孔时孔深度尺寸。
（规定为15倍螺距）惠氏螺纹（BSW、BSF）参数表（55°）小径：d1=d-1.280655t注意：in为英寸符号，一英寸等于25.4毫米。
底孔尺寸均为加工螺纹孔时专用尺寸。
深度尺寸均为加工螺纹孔时光孔深度尺寸。
（规定为15倍螺距）惠氏螺纹为紧固件螺纹。
公称直径为螺纹大径。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
6.2
6.490
6.5
－
－
1/8‐28
8.235
8.2
8.495
8.5
8.191
8.2
1/4‐19
10.941
10.9
11.341
11.4
10.945
10.9
3/8‐19
14.428
14.4
14.846
14.9
14.388
14.4
1/2‐14
17.950
18
18.489
18.5
17.943
─
110.712
110.072
G(PF) 4 1/2‐11
─
123.412
122.772
G(PF) 5‐11
─
136.112
135.472
G(PF) 5 1/2‐11
─
148.812
148.172
G(PF) 6‐11
─
161.512
160.872
美制标准管用螺纹（NPT、NPS）
管用螺纹规格
平行螺纹(NPS）
133.597
133
6‐11
158.510
159
160.655
161
158.810
158
英制平行管用螺纹（G、PF）
内螺纹最小径（参考）
管用螺纹规格
底孔钻头直径
最大尺寸
最小尺寸
G 1/16‐28
6.7
6.843
6.561
G(PF) 1/8‐28
8.7
8.848
8.566
G(PF) 1/4‐19
11.7
48
/
/
5#,(1/8”)
3.18
40
44
40
/
6#
3.51
32
40
/
/8#4.17 Nhomakorabea3236
/
/
10#(3/16”)
4.83
24
32
24
32
12#(7/32”)
5.49
24
28
/
28
1/4”
6.35
20
28
20
26
5/16”
7.94
18
24
18
22
3/8”
9.53
16
20
16
20
7/16”
11.11
30.6
30.931
30.291
G(PF) 1 1/8‐11
35.2
35.579
34.939
G(PF) 1 1/4‐11
39.2
39.592
38.952
G(PF) 1 1/2‐11
45
45.485
44.845
G(PF) 1 3/4‐11
51
51.428
50.788
G(PF) 2‐11
57
57.296
式中dz——攻丝前钻孔直径（毫米）
d——螺纹公称直径（英寸）n——每英寸牙数
【转载】螺纹底孔直径表
英制锥度管用螺纹
管用螺纹规格
JIS B0203
JIS B0203
JIS B 2301
锥度内螺纹Rc(PT)
平行管内螺纹Rp(PS)
锥度管内螺纹
计算数值
底孔直径
计算数值
底孔直径
计算数值
底孔直径
1/16‐28
18
3/4‐14
23.349
23
23.975
24
23.305
23
1‐11
19.423
29
30.111
30
29.353
29
1 1/4‐11
37.940
38
38.772
39
37.890
38
1 1/2‐11
43.833
44
44.565
45
43.720
43
2‐11
55.412
55
56.476
56
55.406
t＞1毫米，dz=d-（1.04～1.06)t
式中t——螺距（毫米）
dz——攻丝前钻孔直径（毫米）
d——螺纹公称直径（毫米）
2.攻英制螺纹：
螺纹公称直径铸铁与青铜钢与黄铜
3/16"～5/8" dz＝25（d-1/n) dz＝25（d-1/n)+0.1
3/4"～11/2" dz＝25（d-1/n) dz＝25（d-1/n) +0.2
10
1 1/8”
28.58
7
12
7
9
1 1/4”
31.75
7
12
7
9
1 3/8”
34.93
6
12
/
8
1 1/2"
38.10
6
12
6
8
1 5/8”
41.28
/
/
/
8
1 3/4”
44.45
5
/
5
7
1 7/8”
47.63
/
/
/
2”
50.80
4.5
/
5
7
螺纹站孔的直径的计算
一般按下列公式：
1.攻公制螺纹：螺距t<1毫米，dz=d-t
11.890
11.445
G(PF) 3/8‐19
15.2
15.395
14.950
G(PF) 1/2‐14
19
19.172
18.631
G(PF) 5/8‐14
21
21.130
20.589
G(PF) 3/4‐14
24.5
24.658
24.117
G(PF) 7/8‐14
28.2
28.418
27.877
G(PF) 1‐11
55
2 1/2‐11
70.701
71
72.009
72
70.788
70
3‐11
83.201
83
84.709
85
83.364
83
3 1/2‐11
95.547
96
97.155
97
95.747
95
4‐11
107.834
108
109.855
110
108.322
108
5‐11
133.110
133
135.255
135
56.656
G(PF) 2 1/4‐11
63
63.392
62.752
G(PF) 2 1/2‐11
72
72.866
72.226
G(PF) 2 3/4‐11
78.5
79.216
78.576
G(PF) 3‐11
85
85.566
84.926
G(PF) 3 1/2‐11
97
98.012
97.372
G(PF) 4‐11
37.31
1.469
37.69
1.484
38.10
1.500
1 1/2‐11 1/2
43.26
1.703
43.66
1.719
44.45
1.750
2‐11 1/2
55.17
2.172
55.58
2.188
56.36
2.219
2 1/2‐8
65.48
2.578
66.27
2.609
67.46
2.656
14
20
14
18
1/2”
12.70
13
18
12
16
9/16”
14.29
12
18
12
16
5/8”
15.88
11
/
11
14
11/16”
17.46
/
16
11
14
3/4”
19.05
10
/
10
12
13/16”
20.64
/
14
/
/
7/8”
22.23
9
/
9
11
15/16”
23.81
/
12
/
/
1”
25.40
8
12
8
英、美制标准螺纹直径、螺距参照系列表
UNC-粗牙
UNF-细牙
标准国别
美制ANSI BI.1-1982
英国标准BS84-1956
规格
直径
UNC牙数/寸
UNF牙数/寸
BSW牙数/寸
BSF牙数/寸
0#
1.52
/
80
/
/
1#
1.85
64
72
/
/
2#
2.18
56
64
/
/
3#
2.51
48
56
/
/
4#
2.84
40
锥度螺纹（NPT）
底孔钻头直径
使用铰刀
不使用铰刀
mm
inch
mm
inch
mm
inch
1/16‐27
5.94
0.234
6.15
0.246
6.35
0.250
1/8‐27
8.33
0.328
8.43