螺纹尺寸对照表
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螺纹代号基本直径内螺纹外螺纹大径中径小径中径公差小径公差A级B级中径公差大径公差中径公差大径公差G1/8″×28 9.728 9.147 8.566 +0.170 +0.282-0.107-0.214-0.214-0.214G1/4″×19 13.157 12.301 11.445 +0.125 +0.445 -0.125 -0.250 -0.250 0-0.250G3/8″×19 16.662 15.806 14.950 +0.125+0.445-0.125-0.250-0.250-0.250G1/2″×14 20.955 19.793 18.631 +0.142+0.541-0.142-0.284-0.284-0.284G5/8″×14 22.911 21.749 20.587 +0.142+0.541-0.142-0.284-0.284-0.284G3/4″×14 26.441 25.279 24.117 +0.142+0.541-0.142-0.284-0.284-0.284G1″×11 33.249 31.770 30.291 +0.180+0.640-0.180-0.360-0.360-0.360G1.1/4″×11 41.910 40.431 38.952 +0.180+0.640-0.180-0.360-0.360-0.360G1.1/2″×11 47.803 46.324 44.854 +0.180+0.640-0.180-0.360-0.360-0.360G2″×11 59.614 58.135 56.656 +0.180+0.640-0.180-0.360-0.360-0.360G2.1/2”X1175.184 73.705 72.226 +0.217+0.640-0.217-0.434-0.434-0.434G3”X1187.884 86.405 84.926 +0.217+0.640-0.217-0.434-0.434-0.434G3.1/2”X11100.330 98.851 97.372 +0.217+0.640-0.217-0.434-0.434-0.434英制锥管螺纹基本尺寸及公差（牙形角55º）BSPT螺纹代号基面上的直径基准长度有效螺纹长度圆锥内螺纹基面轴向位移偏差（±mm）大径中径小径基本最大最小基本最大最小R1/8″×28 9.728 9.147 8.566 4.0 4.9 3.1 6.5 7.4 5.6 1.1 R1/4″×19 13.157 12.301 11.445 6.0 7.3 4.7 9.7 11.0 8.4 1.7 R3/8″×19 16.662 15.806 14.950 6.4 7.7 5.1 10.1 11.4 8.8 1.7 R1/2″×14 20.955 19.793 18.631 8.2 10.0 6.4 13.2 15.0 11.4 2.3 R3/4″×14 26.441 25.279 24.117 9.5 11.3 7.7 14.5 16.3 12.7 2.3 R1″×11 33.249 31.770 30.291 10.4 12.7 8.1 16.8 19.1 14.5 2.9 R1.1/4″×11 41.910 40.431 38.952 12.7 15.0 10.4 19.1 21.4 16.8 2.9 R1.1/2″×11 47.803 46.324 44.845 12.7 15.0 10.4 19.1 21.4 16.8 2.9 R2″×11 59.614 58.135 56.656 15.9 18.2 13.6 23.4 25.7 21.1 2.9 R2.1/2”X1175.184 73.705 72.226 17.5 21.0 14.0 26.7 30.2 23.2 3.5R3”X1187.884 86.405 84.926 20.6 24.1 17.1 29.8 33.3 26.3 3.5 R3.1/2”X11100.330 98.851 97.372 22.2 25.7 18.7 31.4 34.9 27.9 3.5 美制管螺纹基本尺寸及公差（牙形角60º）UN(F)螺纹代号外螺纹内螺纹公差等级公差等级2A 2B大径中径小径小径中径大径最大最小最大最小最小最大最小最大JIC螺纹7/16″×20UNF 11.079 10.874 10.254 10.147 9.568 9.728 10.033 10.287 10.424 11.113 1/2″×20UNF 12.667 12.461 11.841 11.732 11.156 11.328 11.608 11.875 12.017 12.7 9/16″×18UNF 14.252 14.031 13.335 13.221 12.573 12.751 13.081 13.371 13.52 14.288 3/4″×16UNF 19.012 18.773 17.981 17.854 17.12 17.323 17.678 18.019 18.184 19.05 7/8″×14UNF 22.184 21.923 21.006 20.869 20.025 20.269 20.676 21.046 21.224 22.225 1-1/16″×12UN26.944 26.655 25.57 25.425 24.425 24.689 25.146 25.613 25.801 26.988 1-5/16″×12UN 33.294 33.005 31.92 31.773 30.775 31.039 31.496 31.963 32.154 33.338 1-5/8″×12UN 41.229 40.94 39.885 39.705 38.71 38.989 39.446 39.901 40.094 41.275 1-7/8″×12UN 47.579 47.29 46.205 46.053 45.06 45.339 45.796 46.251 46.449 47.625 2-1/2″×12UN 63.452 63.162 62.078 61.92 60.932 61.214 61.671 62.126 62.332 63.5ORFS螺纹9/16″×18UNF 14.252 14.031 13.335 13.221 12.573 12.751 13.081 13.371 13.52 14.288 11/16″×16UN 17.427 17.188 16.396 16.274 15.535 15.748 16.104 16.431 16.589 17.463 13/16″×16UN 20.599 20.361 19.568 19.444 18.707 18.923 19.279 19.606 19.766 20.638 1″×14UNF 25.357 25.095 24.178 24.036 23.195 23.444 23.825 24.221 24.407 25.4 1-3/16″×12UN 30.119 29.83 28.745 28.598 27.6 27.864 28.321 28.788 28.979 30.163 1-7/16″×12UN 36.467 36.177 35.093 34.943 33.947 34.214 34.671 35.138 35.331 36.513 1-11/16″×12UN 42.817 42.527 41.443 41.29 40.297 40.564 41.021 41.488 41.686 42.863 2″×12UN 50.754 50.465 49.38 49.225 48.235 48.514 48.971 49.426 49.627 50.8SAE螺纹5/8″×18UNF 15.839 15.618 14.923 14.803 14.161 14.351 14.681 14.958 15.11 15.875 1-1/16″×14UN 26.947 26.683 25.743 25.608 24.74 24.968 25.375 25.783 25.961 26.987其它美制螺纹9/16″×16UN 14.252 14.013 13.221 13.101 12.36 12.573 12.929 13.256 13.411 14.288 7/8″×12UN 22.182 21.892 20.808 20.668 19.662 19.939 20.396 20.851 21.034 22.225 2-1/4″×12UN 57.104 56.815 55.73 55.575 54.585 54.864 55.321 55.776 55.976 57.15 注：UNC粗牙螺纹系列，UNF细牙螺纹系列，UNEF超细牙螺纹系列，UN不变螺距系列螺纹代号基面上的直径螺纹长度大径中径小径有效长度管端至基面长Z1/8″×27 10.272 9.519 8.766 7 4.572 Z1/4″×18 13.572 12.443 11.314 9.5 5.080 Z3/8″×18 17.055 15.926 14.797 10.5 6.096 Z1/2″×14 21.223 19.772 18.321 13.5 8.028 Z3/4″×14 26.568 25.117 23.666 14 8.611Z1″×11.5 33.228 31.461 29.694 17.5 10.160 Z1.1/4″×11.5 41.985 40.218 38.451 18 10.688 Z1.1/2″×11.5 48.054 46.287 44.520 18.5 10.688 Z2″×11.5 60.092 58.325 56.558 19 11.074 公制螺纹基本尺寸及公差(牙形角60º) M螺纹代号基本直径内螺纹外螺纹大径中径小径公差等级公差等级6H 7H 6g中径公差小径公差中径公差小径公差中径公差大径公差M10X1 10 9.350 8.917 +0.150+0.236+0.190+0.300-0.026-0.138-0.026-0.206M12X1 12 11.350 10.917 +0.160+0.236+0.200+0.300-0.026-0.144-0.026-0.206M14X1 14 13.350 12.917 +0.160+0.236+0.200+0.300-0.026-0.144-0.026-0.206M12X1.25 12 11.188 10.647 +0.180+0.265+0.224+0.335-0.028-0.160-0.028-0.240M14X1.25 14 13.188 12.647 +0.180+0.265+0.224+0.335-0.028-0.160-0.028-0.240M12X1.5 12 11.026 10.376 +0.190+0.300+0.236+0.375-0.032-0.172-0.032-0.268M14X1.5 14 13.026 12.376 +0.190+0.300+0.236+0.375-0.032-0.172-0.032-0.268M16X1.5 16 15.026 14.376 +0.190+0.300+0.236+0.375-0.032-0.172-0.032-0.268M18X1.5 18 17.026 16.373 +0.190+0.300+0.236+0.375-0.032-0.172-0.032-0.268M20X1.5 20 19.026 18.376 +0.190+0.300+0.236+0.375-0.032-0.172-0.032-0.268M22X1.5 22 21.026 20.376 +0.190+0.300+0.236+0.375-0.032-0.172-0.032-0.268M24X1.5 24 23.026 22.376 +0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M26X1.5 26 25.026 24.376 +0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M27X1.5 27 26.026 25.376 +0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M30X1.5 30 29.026 28.376 +0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M33X1.5 33 32.026 31.376 +0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M36X1.5 36 35.026 34.376 +0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M39X1.5 39 38.026 37.376 +0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M42X1.5 42 41.026 40.376 +0.200+0.300+0.250+0.375-0.032-0.182-0.032-0.268M27X2 27 25.701 24.835 +0.224+0.375+0.280+0.475-0.038-0.208-0.038-0.318M30X2 30 28.701 27.835 +0.224+0.375+0.280+0.475-0.038-0.208-0.038-0.318M33X2 33 31.701 30.835 +0.224+0.375+0.280+0.475-0.038-0.208-0.038-0.318M36X2 36 34.701 33.835 +0.224+0.375+0.280+0.475-0.038-0.208-0.038-0.318M39X2 39 37.701 36.835 +0.224+0.375+0.280+0.475-0.038-0.208-0.038-0.318M42X2 42 40.701 39.835 +0.224+0.375+0.280+0.475-0.038-0.208-0.038-0.318M45X2 45 43.701 42.835 +0.224+0.375+0.280+0.475-0.038-0.208-0.038-0.318M52X2 52 50.701 49.835 +0.236+0.375+0.300+0.475-0.038-0.218-0.038-0.318M60X2 60 58.701 57.835 +0.236+0.375+0.300+0.475-0.038-0.218-0.038-0.318M64X2 64 62.701 61.835 +0.236+0.375+0.300+0.475-0.038-0.218-0.038-0.318M72X2 72 70.701 69.835 +0.236+0.375+0.300+0.475-0.038-0.218-0.038-0.31855°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。
螺纹尺寸对照表
最小最大最小最大 8-320.15710.16310.13990.14280.1248(0.164-32) 3.9903 4.1427 3.5535 3.6271 3.1699 10-240.18180.1890.15860.16190.1379(0.190-24) 4.6177 4.8006 4.0284 4.1123 3.5027 12-240.20780.2150.18450.18790.1639(0.216-24) 5.2781 5.461 4.6863 4.7727 4.1631 1/4-200.24080.24890.21270.21640.1876(0.250-20) 6.1163 6.3221 5.4026 5.4966 4.765 5/16-180.30260.31130.27120.27520.2431(0.3175-18)7.6867.907 6.8885 6.9901 6.1747 3/8-160.36430.37370.32870.33310.297(0.375-16)9.25329.4928.3498.46077.5438 7/16-140.42580.43610.3850.38970.3485(0.4375-14)10.815311.07699.7799.89848.8519 1/2-130.48760.49850.44350.44850.4041(0.50-13)12.38512.661911.264911.391910.26419/16-120.54950.56090.50160.50680.4587(0.5625-12)13.957314.246912.740612.872711.651 5/8-110.61130.62340.55890.56440.5119(0.625-11)15.52715.834414.196114.335813.0023 3/4-100.73530.74820.67730.68320.6255(0.750-10)18.676619.004317.203417.353315.8877 7/8-90.85920.87310.79460.80090.7368(0.875-9)21.823722.176720.182820.342918.71471"-80.9830.9980.910.91680.8446(1.000-8)24.968225.349223.11423.286721.4528最小最大最小最大 8-360.15770.16320.14240.14520.1291(0.164-36) 4.0056 4.1453 3.617 3.6881 3.2791 10-320.18310.18910.16580.16880.1508(0.190-32) 4.6507 4.8031 4.2113 4.2875 3.8303 12-280.20850.2150.18860.19180.1712美制外螺纹（2A）常用规格极限尺寸表（粗牙）公称尺寸和每英寸牙数螺纹系列代号大径极限中径极限小径max 1.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。
螺纹基本尺寸对照表
螺纹基本尺寸对照表（以及螺纹底孔相关尺寸）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——英国标准惠氏螺纹（粗牙）BSF——英国标准惠氏螺纹（细牙）G——直管螺纹(外螺纹分A、B两级即在螺纹中径公差有所区别，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——统一制粗牙螺纹（代替NC）UNF——统一制细牙螺纹（代替NF）UNEF——统一制超细牙螺纹UN——统一制不变螺距螺纹UNS——统一制特殊螺纹三、美制螺纹（螺纹牙型角60度）NPT——一般用途锥管螺纹（旧代号Z、K）（斜角为1°47'即1：16）NPSC——管接头直管内螺纹NPSM——设备上自由配合，机械连接用直管螺纹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、普通螺纹（螺纹牙型角60度）M——普通螺纹代号八、特殊螺纹Tr——梯形螺纹（螺纹牙型角30度）B——锯齿形螺纹（牙型角30×30度）螺纹公称直径d 螺距P钻头直径d铜不锈钢2 0．4 1．6 1．6 0．25 1．75 1．753 0．5 2．5 2．5 0．35 2．15 2．154 0．7 3．3 3．3 0．5 3．5 3．55 0．8 4．1 4．2 0．5 4．5 4．561 4．9 5 0．75 5．2 5．28 1．25 6．6 6．7 1 7 7 0．75 7．1 7．210 1．5 8．4 8．5 1．25 8．6 8．7 1 6．9 7 0．75 7．1 7．212 1．75 10．1 10．2 1．5 10．4 10．5 1．25 10．6 10．7 1 10．9 11142 11．8 12 1．5 12．4 12．5 1 12．9 13162 13．8 14 1．5 14．4 14．5 1 14．9 1518 2．5 15．3 15．5 2 15．8 16 1．5 16．4 16．5 1 16．9 1720 2．5 17．3 17．5 2 17．8 18 1．5 18．4 18．5 1 18．9 1922 2．5 19．3 19．5 2 19．8 20 1．5 20．4 20．5 1 20．9 21243 20．7 21 2 21．8 22 1．5 22．4 22．5 1 22．9 23非螺纹密封英制英制锥管螺纹英制锥螺纹螺纹直径牙数钻头直径螺纹直径牙数钻头直径螺纹直径牙数钻头直径1/8 28 8．8 1/8 28 8．4 1/8 27 8．6 1/4 19 11．7 1/4 19 11．2 1/4 18 11．1 3/8 19 15．2 3/8 19 14．7 3/8 18 14．5 1/2 14 18．9 1/2 14 18．3 1/2 14 17．9 3/4 14 24．4 3/4 14 23．6 3/4 14 23．21 11 30．6 1 14 29．7 1 11．5 29．2 1-1/4 11 39．2 1-1/4 11 38．3 1-1/4 11．5 37．9 1-3/8 11 41．6 1-1/2 11 44．1 1-1/2 11．5 43．9 1-1/2 11 45．1 2 11 55．8 2 11．5 56螺距(t) 螺纹长度基面上螺纹直径牙型高度(h1) 有效长度基面长度外径(d) 中径(d2) 内径(d1)0.91 9 4.5 9.73 9.15 8.57 0.581.34 11 6 13.16 12.3 11.45 0.861.34 12 6 16.66 15.81 14.95 0.861.81 15 7.5 20.96 19.79 18.63 1.161.81 17 9.5 26.44 25.28 24.12 1.162.31 19 11 33.25 31.77 30.29 1.482.31 22 13 41.91 40.43 38.95 1.482.31 23 14 47.81 46.33 44.85 1.482.31 26 16 59.62 58.14 56.66 1.482.31 30 18.5 75.19 73.71 72.23 1.482.31 32 20.5 87.89 86.41 84.93 1.482.31 38 25.5 113.03 111.56 110.08 1.48本螺纹基面上各直径等于圆柱螺纹的各相应直径基面上螺纹内径d1 = d - 1.28t3/4″= 26.44 - 1.28 * 1.81 = 24.12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)管子外径（d) 管接头螺纹内径（d1') 牙型高度(h1) 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 28 0.91 9.73 9.68 9.38 8.57 8.92 8.67 0.58 1/4 19 1.34 13.16 13.1 12.74 11.45 11.84 11.56 0.86 3/8 19 1.34 16.66 16.6 16.24 14.95 15.35 15.06 0.86 1/2 14 1.81 20.96 20.89 20.5 18.63 19.05 18.75 1.16 5/8 14 1.81 22.91 22.85 22.46 20.59 21.01 20.71 1.16 3/4 14 1.81 26.44 26.38 25.97 24.12 24.57 24.25 1.16 7/8 14 1.81 30.2 30.14 29.73 27.88 28.33 28.01 1.16 1 11 2.31 33.25 33.18 32.75 30.29 30.79 30.43 1.48 1-1/4 11 2.31 41.91 41.84 41.36 38.95 39.46 39.1 1.48 1-3/8 11 2.31 44.33 44.26 43.78 41.37 41.87 41.51 1.48 1-1/2 11 2.31 47.81 47.74 47.21 44.85 45.4 45 1.48 1-3/4 11 2.31 53.75 53.67 53.14 50.79 51.34 50.94 1.48 2 11 2.31 59.62 59.54 59.01 56.66 57.21 56.81 1.48 2-1/2 11 2.31 75.19 75.11 74.54 72.23 72.83 72.39 1.48 3 11 2.31 87.89 87.8 87.19 84.93 85.58 85.1 1.48外径d由公称直径所决定螺纹内径d1 = d - 1.28t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) 有效长度基面长度外径(d) 中径(d2) 内径(d1)1/16 27 0.94 6.5 4.06 7.9 7.14 6.39 0.75 1/8 27 0.94 7 4.57 10.27 9.52 8.77 0.75 1/4 18 1.41 9.5 5.08 13.57 12.44 11.31 1.13 3/8 18 1.41 10.5 6.1 17.06 15.93 14.8 1.13 1/2 14 1.81 13.5 8.13 21.22 19.77 18.32 1.45 3/4 14 1.81 14 8.61 26.57 25.12 23.67 1.45 1 11-1/2 2.21 17.5 10.16 33.23 31.46 29.69 1.77 1-1/4 11-1/2 2.21 18 10.67 41.99 40.22 38.45 1.77 1-1/2 11-1/2 2.21 18.5 10.67 48.05 46.29 44.52 1.77 2 11-1/2 2.21 19 11.07 60.09 58.33 56.56 1.77外径d由公称直径所决定牙型高度h1=0.8t基面上螺纹内径d1 = d - 1.6t3/8″= 17.06mm d1=17.06 - 1.6 * 1.41 = 14.80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 1.06 4.63 4.5 4.24 3.56 3.97 3.71 Φ3.7 1/4″20 1.27 6.2 6.05 5.75 4.91 5.39 5.1 Φ5.1 5/16″18 1.41 7.78 7.62 7.31 6.34 6.86 6.55 Φ6.5 3/8″16 1.59 9.36 9.2 8.9 7.73 8.29 7.97 Φ7.9 7/16″14 1.81 10.93 10.75 10.45 9.06 9.67 9.33 Φ9.3 1/2″12 2.12 12.5 12.3 11.9 10.3 10.96 10.61 Φ10.5 9/16″12 2.12 14.08 13.87 13.47 11.89 12.56 12.2 Φ12.1 5/8″11 2.31 15.65 15.43 15.03 13.26 13.94 13.6 Φ13.5 3/4″10 2.54 18.81 18.57 18.17 16.17 16.92 16.54 Φ16.4 7/8″9 2.82 21.96 21.7 21.2 19.03 19.82 19.45 Φ19.5 1″8 3.18 25.11 24.82 24.32 21.8 22.67 22.27 Φ22 1-1/8″7 3.63 28.25 27.93 27.33 24.46 25.43 24.991-1/4″7 3.63 31.43 31.09 30.49 27.64 28.59 28.181-3/8″ 6 4.23 34.56 34.2 33.6 30.13 31.23 30.761-1/2″ 6 4.23 37.73 37.36 36.76 33.31 34.38 33.941-3/4″ 5 5.08 44.02 43.59 42.79 38.7 39.95 39.451-7/8″ 4.5 5.64 47.15 46.68 45.88 41.23 42.58 42.062″ 4.5 5.64 50.32 49.84 49.04 44.41 45.79 45.25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d =d'-0.075t-0.0511/16 14 1.814 17.28 15.4 3/8 20 1.27 9.38 8.08 7/8 11 2.31 22 19.6 5/8 14 1.81 15.69 13.82 3/4 12 2.12 18.84 16.65 1/4 26 0.976 6.23 5.24 1/2 16 1.587 12.53 10.9 1 10 2.54 25.15 22.52内螺纹d'（公称直径）外螺纹d1=内径=d'-1.28t 3/4″=19.05-1.28*2.116=16.34内螺纹d1=内径=d'-1.134t 3/4″=19.05-1.134*2.116=16.653/4″=12牙/英寸 t=2.116。
螺纹基本尺寸对照表
螺纹基本尺寸对照表（以及螺纹底孔相关尺寸）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——英国标准惠氏螺纹（粗牙）BSF——英国标准惠氏螺纹（细牙）G——直管螺纹(外螺纹分A、B两级即在螺纹中径公差有所区别，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——统一制粗牙螺纹（代替NC）UNF——统一制细牙螺纹（代替NF）UNEF——统一制超细牙螺纹UN——统一制不变螺距螺纹UNS——统一制特殊螺纹三、美制螺纹（螺纹牙型角60度）NPT——一般用途锥管螺纹（旧代号Z、K）（斜角为1°47'即1：16）NPSC——管接头直管内螺纹NPSM——设备上自由配合，机械连接用直管螺纹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、普通螺纹（螺纹牙型角60度）M——普通螺纹代号八、特殊螺纹Tr——梯形螺纹（螺纹牙型角30度）B——锯齿形螺纹（牙型角30×30度）。
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4.5 × 0.5 4
5 × 0.5 4.5
5.5 × 0.5 5
6 × 0.75 5.3
7 × 0.75 6.3
8 ×1 7
8 × 0.75 7.3
9 ×1 8
9 × 0.75 8.3
10
× 8.8
1.25
10 × 1 9
10
× 9.3
0.75
11 × 1 10
11
× 10.3
0.75
12 × 1.5 10.5
15~25
－ － － － 7~12
7~12
－ 17~22
－ － 27~32
27~32
2~5 2~5 2~5 4~8 2~5
5~10
10~20 10~20 7~12
－
6~11
10~25
－
10~20 100~300 5~10
15~20
10~15 10~15
10~20
10~20 10~20
10~15
－ 7~12
3.878 4.334 5.153 6.153 6.912 7.912 8.676 9.676 10.441 12.21 14.21 15.744 17.744 19.744 21.252 24.252 26.771 29.771 32.27 35.27 37.799
45 × 4.5 40.5
48 × 5 43
11 × 1.5 9.5
12
× 10.3
1.75
14 × 2 12
16 × 2 14
18 × 2.5 15.5
20 × 2.5 17.5
22 × 2.5 19.5
24 × 3 21
27 × 3 24
30 × 3.5 26.5
33 × 3.5× 4 35
42 × 4.5 37.5
15 × 1 14 16 × 1.5 14.5 16 × 1 15 17 × 1.5 15.5 17 × 1 16 18 × 2 16 18 × 1.5 16.5 18 × 1 17 20 × 2 18 20 × 1.5 18.5 20 × 1 19 22 × 2 20 22 × 1.5 20.5 22 × 1 21 24 × 2 22 24 × 1.5 22.5 24 × 1 23 25 × 2 23 25 × 1.5 23.5 25 × 1 24
最小直徑 最大直徑
M1 0.25
1.1 0.25 1.2 0.25
× 0.75 × 0.85 × 0.95
1.4 × 0.3 1.1
1.6 0.35
× 1.25
1.8 0.35
× 1.45
2 × 0.4 1.6
2.2 0.45
× 1.75
2.5 0.45
× 2.1
3 × 0.5 2.5
3.5 × 0.6 2.9
註 (1)M1.4 以下等 級：5H 、M1.6 以上等 級：6H (2)基於 JIS B 02091982標 準
40.6 (90%)
43.1 (90%)
40.129 42.587
40.799 43.297
螺紋下 孔徑表
公制細牙 螺紋
JIS B 02111982(單 位：mm)
崁合度區 分：中(注 螺紋尺寸 鑽頭直徑 1)2級(注2)
SUS SUS630 SUS631
SKD SC FC FCD Cu
Bs‧BsC
PB‧PBC
AL
AC‧ADC
MC ZDC Thermo Setting Plastic Thermo Plastic
◎最適 ○ 適用 △可 使用 －不 可使用
8~13
7~12
6~9 7~12 3~5 (4~8) 4~7 3~5 6~9 6~11 10~15 7~12 6~9 10~15
8.85 (85%)
9.13 (80%)
9.35 (80%)
10.13 (80%)
10.35 (80%)
10.62 (85%)
10.85 (85%)
11.13 (80%) 12.62 (85%) 13.13 (80%) 13.62 (85%)
3.459 3.599 3.959 4.099 4.459 4.599 4.959 5.099 5.188 5.378 6.188 6.378 6.917 7.153 7.188 7.378 7.917 8.153 8.188 8.378 8.647 8.912 8.917 9.153 9.188 9.378 9.917 10.153 10.188 10.378 10.376 10.676 10.647 10.912 10.917 11.153 12.376 12.676 12.917 13.153 13.376 13.676
2.85 3.242
0.785 0.885 0.985 1.142 1.321 1.521 1.679 1.838 2.138 2.599
3.01 3.422
4.5 0.75
× 3.8
5 × 0.8 4.2
6 ×1 5
7 ×1 6
8 × 1.25 6.8
9 × 1.25 7.8
10 × 1.5 8.5
24.2 (85%)
26.6 (90%)
29.6 (90%)
32.1 (90%)
35.1 (90%)
37.6 (90%)
3.688 4.134 4.917 5.917 6.647 7.647 8.376 9.376 10.106 11.835 13.835 15.294 17.294 19.294 20.752 23.752 26.211 29.211 31.67 34.67 37.129
32 × 2 30 32 × 1.5 30.5 33 × 3 30 33 × 2 31 33 × 1.5 31.5 35 × 1.5 33.5 36 × 3 33 36 × 2 34 36 × 1.5 34.5 38 × 1.5 36.5 39 × 3 36 39 × 2 37 39 × 1.5 37.5 40 × 3 37 40 × 2 38 40 × 1.5 38.5 42 × 4 38 42 × 3 39 42 × 2 40 42 × 1.5 40.5 45 × 4 41 45 × 3 42
崁合度區分：中(註 1)2級(註2)
下孔徑
內螺紋小徑
最小直徑 最大直徑
M 2.5 × 2.2 0.35
3 × 0.35 2.7
3.5 0.35
× 3.2
2.22 (75%)
2.72 (75%)
3.22 (75%)
2.121 2.221 2.621 2.721 3.121 3.221
4 × 0.5 3.5
14.13 (80%) 14.62 (85%) 15.13 (80%) 15.62 (85%) 16.13 (80%)
16.2 (85%) 16.62 (85%) 17.13 (80%)
18.2 (85%) 18.62 (85%) 19.13 (80%)
20.2 (85%) 20.62 (85%) 21.13 (80%)
30.2 (85%) 30.62 (85%)
30.2 (85%)
31.2 (85%) 31.62 (85%) 33.62 (85%)
33.2 (85%)
34.2 (85%) 34.62 (85%) 36.62 (85%)
36.2 (85%)
37.2 (85%) 37.62 (85%)
37.2 (85%)
38.2 (85%) 38.62 (85%)
38.1 (90%)
39.2 (85%)
40.2 (85%) 40.62 (85%)
41.1 (90%)
42.2 (85%)
29.835 30.376 29.752 30.835 31.376 33.376 32.752 33.835 34.376 36.376 35.752 36.835 37.376 36.752 37.835 38.376 37.67 38.752 39.835 40.376 40.67 41.752
4 × 0.7 3.3
0.78 (80%)
0.88 (80%)
0.98 (80%)
1.14 (80%)
1.32 (75%)
1.52 (75%)
1.65 (80%)
1.83 (75%)
2.13 (75%)
2.59 (75%)
3.01 (75%)
3.39 (80%)
0.729 0.829 0.929 1.075 1.221 1.421 1.567 1.713 2.013 2.459
高速同步絲 攻
管用絲攻
15~25
－
8~13 27~32
3~6
10~15
－
7~10 27~32
3~6
8~13
－
10~15
－
4~6
－
(6~10)
8~13
－
4~6
－
5~8
22~27
2~5
5~8
22~27
2~5
－
－
2~5
5~10
－
3~6
－
－
2~5
7~10 10~15
－ 10~20 7~12
15~25
－ － 10~20 10~20 10~20
80~300
－ 27~100
10~15
10~15 10~15
－
15~25
－
－
5~10
10~20 10~20
－
27~32 5~10
螺紋下 孔徑表
公制粗牙 螺紋
JIS B 02091982(單 位：mm)