国标 英标 美标螺纹规格表
英、美制螺纹标准直径、螺距参照表
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
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
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
国标英制美制螺纹大全
5/16 -18 6.50 7.02 6.41
3/8 -16 7.90 8.49 7.81
7/16 -14 9.30 9.93 9.15
1/2 -13 10.80 11.43 10.58
9/16 -12 12.20 12.91 12.00
5/8 -11 13.50 14.38 13.38
3/4 -10 16.50 17.40 16.30
2.96 3.64 4.32 5.00 6.55 8.17 9.75 11.39 12.98 14.59 16.18
3.12 3.82 4.50 5.18 6.72 8.35 9.93 11.59 13.18 14.80 16.39
3/4-16 19.50 19.39 19.61
美制號數牙之外徑換算
規格
NPT NPS 下孔徑 下孔徑
1/16 -27 6.20 6.35
1/8 -27 8.50 8.75
1/4 -18 11.00 11.15
3/8 -18 14.50 14.70
1/2 -14 18.00 18.15
3/4 -14 23.00 23.40
1
-11 1/2 29.00 29.40
1 1/4 -11 1/ 38.00 38.10
6.30 8.30 11.00 14.50 18.10
6.50 8.60 11.50 15.00 18.50
23.50 24.00
29.60 30.25
38.10 39.00 44.00 44.90
55.60 56.60
美 制管牙
6.70 8.70 11.70 15.25 19.00 21.00 24.50 28.00 30.50 35.50 39.50 45.00 51.00 57.00
美,英,公螺钉对照表
美制细螺纹
3级牙钻孔径 规格 标准径 最大 最小
NO.0-80(1.524) NO.1-72(1.854) NO.2-64(2.184) NO.3-56(2.615) NO.4-48(2.845) NO.5-44(3.175) NO.6-40(3.505) NO.8-36(4.166) NO.10-32(4.826) NO.12-28(5.846) 1/4-28 5/16-24 3/8-24 7/16-20 1/2-20 9/16-18 5/8-18 3/4-16 7/8-14 1-12 1-1/8-12 1-1/4-12 1-3/8-12 1-1/2-12 1.25 1.55 1.85 2.10 2.40 2.70 2.90 3.50 4.10 4.60 5.50 6.90 8.50 9.90 11.50 12.90 14.50 17.50 20.50 23.20 26.50 29.50 32.80 36.0 1.305 1.612 1.912 2.197 2.458 2.740 3.022 3.606 4.165 4.724 5.588 7.035 8.636 1.182 1.474 1.756 2.025 2.271 2.551 2.820 3.404 3.963 4.496 5.360 6.782 8.382 NO.12-32 1/4-32 5/16-32 3*8-32 7/16-28 1/2-28 9/16-24 5/8-24 3/4-20 7/8-20 1-20
1.55 1.80 2.10 2.30 2.60 2.80 3.40 3.90 4.50 5.10 6.60 8.00 9.40 10.80 12.20 13.60 16.50 19.50 22.20 25.00 28.20 30.80 34.00 39.50 45.20 1.582 1.871 2.146 2.385 2.697 2.895 3.530 3.962 4.597 5.257 6.731 8.153 9.550 11.023 12.446 12.868 16.840 19.761 22.606 25.349 28.524 31.115 34.290 39.827 45.593
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)4 0 09 1 072 R5 5"138.432.30911136.951135.4721.479R66"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)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）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)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 1.162 0.249 20.955 19.793 18.631 8.2 13.2 3/4 14 1.814 1.162 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 58.135 56.656 15.9 23.4 2.1/2 11 2.309 1.479 0.317 75.184 73.705 72.226 17.5 26.7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。
螺纹基本尺寸对照表【精选】
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）以下是附加文档，不需要的朋友下载后删除，谢谢顶岗实习总结专题13篇第一篇:顶岗实习总结为了进一步巩固理论知识，将理论与实践有机地结合起来，按照学校的计划要求，本人进行了为期个月的顶岗实习。
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)
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。
螺纹规格-美制、英制、公制对照表
螺纹规格-美制、英制、公制美制细牙UNF 2A 外螺纹大径UNFUN 2B内螺纹小径（UN 、UNF ）序号序号规格型号规格型号最大最大最小最小公差公差最小最小最大最大公差公差1 7/16"-20 11.079 10.874 0.206 9.728 10.033 0.305 2 1/2"-20 12.667 12.461 0.206 11.328 11.608 0.279 3 9/16"-18 14.252 14.031 0.221 12.751 13.081 0.330 4 3/4"-16 19.012 18.773 0.239 17.323 17.678 0.356 5 7/8"-14 22.184 21.923 0.262 20.269 20.676 0.406 6 11/16-12 26.944 26.655 0.290 24.689 25.146 0.457 7 15/16-12 33.294 33.005 0.290 31.039 31.496 0.457 8 15/8-12 41.229 40.940 0.290 38.989 39.446 0.457 9 17/8-12 47.579 47.290 0.290 45.339 45.796 0.457 10 21/2-12 63.452 63.162 0.290 61.214 61.671 0.457 公制细牙 6g 外螺纹大径 6H 内螺纹小径内螺纹小径1 M10*1 9.974 9.794 0.180 8.917 9.157 0.240 2 M12*1.5 11.968 11.732 0.236 10.376 10.676 0.300 3 M14*1.5 13.968 13.732 0.236 12.376 12.676 0.300 4 M16*1.5 15.968 15.732 0.236 14.376 14.676 0.300 5 M18*1.5 17.968 17.732 0.236 16.376 16.676 0.300 6 M20*1.5 19.968 19.732 0.236 18.376 18.676 0.300 7 M22*1.5 21.968 21.732 0.236 20.376 20.676 0.300 8 M24*1.5 23.968 23.732 0.236 22.376 22.676 0.300 9 M26*1.5 25.968 25.732 0.236 24.376 24.676 0.300 10 M27*1.5 26.968 26.732 0.236 25.376 25.676 0.300 11 M30*1.5 29.968 29.732 0.236 28.376 28.676 0.300 12 M27*2 26.962 26.682 0.280 24.835 25.210 0.375 13 M30*2 29.962 29.682 0.280 27.835 28.210 0.375 14 M33*2 32.962 32.682 0.280 30.835 31.210 0.375 15 M36*2 35.962 35.682 0.280 33.835 34.210 0.375 16 M42*2 41.962 41.682 0.280 39.835 40.210 0.375 英制管螺纹英制管螺纹1 G1/8-28 9.728 9.514 0.214 8.566 8.848 0.282 2 G1/4-19 13.157 12.907 0.250 11.445 11.890 0.445 3 G3/8-19 16.662 16.412 0.250 14.950 15.395 0.445 4 G1/2-14 20.955 20.671 0.284 18.631 19.172 0.541 5 G3/4-14 26.441 26.157 0.284 24.117 24.658 0.541 6 G1-11 33.249 32.889 0.360 30.291 30.931 0.640 7 G11/4-11 41.910 41.550 0.360 38.952 39.592 0.640 8 G11/2-11 47.803 47.443 0.360 44.845 45.485 0.640 公制/美制/英制螺纹对照表给大家分享一下A 型美制螺纹（UNF ）常用规格 外螺纹外螺纹内螺纹 -4 9/16"-199/16"-19牙 14.28 14.28 13.0813.08-6 11/16''-16 11/16''-16 17.46 17.46 16.116.1-8 13/16''-16 13/16''-16 20.64 20.64 19.2819.28 -10 1''-14 1''-14 25.40 25.40 23.5723.57-12 1(3/16)''-12 1(3/16)''-12 30.00 30.00 28.3228.32-16 1(7/16)''-12 1(7/16)''-12 36.51 36.51 34.6734.67-20 1(11/16)''-12 1(11/16)''-12 42.86 42.86 41.0241.02C 型JIC37度美制UNF 螺纹常用规格 -4 7/16”-20 7/16”-20 11.11 11.11 10.0310.03 -5 1/2”-20 1/2”-20 12.70 12.70 11.32 11.32-6 9/16”-18 9/16”-18 14.28 14.28 13.0813.08-8 3/4”-16 3/4”-16 19.00 19.00 17.6817.68-10 7/8”-14 7/8”-14 22.22 22.22 20.6820.68-12 1(1/16)"-12 1(1/16)"-12 26.98 26.98 25.1525.15-16 1(5/16)"-12 1(5/16)"-12 33.33 33.33 31.531.5-20 1(5/8)"-12 1(5/8)"-12 41.28 41.28 39.4439.44 -24 1(7/8)"-12 1(7/8)"-12 47.62 47.62 45.845.8-32 2(1/2)"-12 2(1/2)"-12 63.5 63.5 61.67英制圆柱管螺纹（BSPP ）常用规格 -4 1/4”-19 1/4”-19 13.157 13.157 11.55-6 3/8”-19 3/8”-19 16.662 16.662 14.9514.95-8 1/2”-14 1/2”-14 20.955 20.955 18.6318.63 -12 3/4”-14 3/4”-14 26.441 26.441 24.11-16 1”-11 1”-11 33.249 33.249 30.29-20 1(1/4)''-11 1(1/4)''-11 41.91 41.91 38.9538.95英制圆锥管螺纹（BSPT ）常用规格 基面大径基面大径基准距离1/4”-19 1/4”-19 13.157 13.157 663/8”-19 3/8”-19 16.662 16.662 6.46.41/2”-14 1/2”-14 20.955 20.955 8.28.23/4”-14 3/4”-14 26.441 26.441 9.59.51”-11 1”-11 33.249 33.249 10.410.41(1/4)''-11 1(1/4)''-11 41.91 41.91 12.712.7美制圆锥管螺纹（NPT ）1/8”-27 1/8”-27 10.24 10.24 441/4”-18 1/4”-18 13.60 13.60 443/8”-18 3/8”-18 17.04 17.04 4.324.321/2”-14 1/2”-14 21.22 21.22 4.484.483/4”-14 3/4”-14 26.57 26.57 4.754.751”-11(1/2)” 1”-11(1/2)” 33.22 33.22 4.64.61(1/4)”-11.5 1(1/4)”-11.5 41.96 41.96 4.834.83。
螺纹各国标准对照
一、英制螺纹（螺纹牙型角55度）Thread of British standard ( Thread pitch shape an gle 55°)BSW－－－－英国标准惠氏螺纹（粗牙）British Standard Whitworth Thread ( C oarse )BSF－－－－英国标准惠氏螺纹（细牙）British Standard Whitworth Thread ( Fi ne )G－－－－直管螺纹（外螺纹分A、B两面级、丝锥分G、G－D）Straight pipe thr ead ( 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 pur pose ( Oldthread 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 ge neral 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 threadNPT为60度牙型角锥管螺纹,R为55度牙型角螺纹密封的管螺纹,R为圆柱外螺纹,RC为圆锥内螺纹,Z为标准锥管螺纹.NPT为60度牙型角锥管螺纹用螺纹密封的管螺纹其标记及各种螺纹的特征代号规定如下：Rc—圆锥内螺纹Rp—与圆锥外螺纹配合的圆柱内螺纹R—圆锥外螺纹G螺纹表示非螺纹密封的管螺纹BSP为英制管螺纹总体代号，但是分为三种BSPP、BSPT和BSPF。
公制美制英制螺纹对照表
2
M12*1.5
3
M14*1.5
4
M16*1.5
5
M18*1.5
6
M20*1.5
7
M22*1.5
8
M24*1.5
9
M26*1.5
10
M27*1.5
11
M30*1.5
12
M27*2
13
M30*2
14
M33*2
15
M36*2
16
M42*2
英制管螺纹
序号 规格型号
1
G1/8-28
2
G1/4-19
3
G3/8-19
内径 8.566 11.445 14.95 18.631 24.117 27.877 30.291 38.952
刀具尺寸 备注 8.696±0.05 11.66±0.05 15.17±0.05 18.9±0.05 24.38±0.05 28.14±0.05 30.61±0.05 39.3±0.05
公制螺纹常用规格 序号 公称直径 1 16*1.5 2 18*1.5 3 22*1.5 4 27*2 5 33*2 6 42*2
0.7079 0.6718 17.9807 17.0637 17.91
0.827 0.7858 21.0058 19.9593 20.93
0.9441 0.896 23.9801 22.7584 23.9
美制UNF螺纹常用规格
序号
标记
1 3/4-16UNF-2B
2 7/8-14UNF-2B
3 7/16-20UNF-2B
牙数 16 14 20 18 18
外径 19.05 22.225 11.1125 14.2875 15.875
螺纹规格-美制、英制、公制对照表
螺纹规格-美制、英制、公制对照表螺纹规格-美制、英制、公制美制细牙UNF 2A 外螺纹大径UNFUN 2B内螺纹小径（UN、UNF）序号规格型号最大最小公差最小最大公差1 7/16"-20 11.079 10.874 0.206 9.728 10.033 0.3052 1/2"-20 12.667 12.461 0.206 11.328 11.608 0.2793 9/16"-18 14.252 14.031 0.221 12.751 13.081 0.3304 3/4"-16 19.012 18.773 0.239 17.323 17.678 0.3565 7/8"-14 22.184 21.923 0.262 20.269 20.676 0.406-12 26.944 26.655 0.290 24.689 25.146 0.4576 11/167 15/-12 33.294 33.005 0.290 31.039 31.496 0.457 168 15/-12 41.229 40.940 0.290 38.989 39.446 0.45789 17/-12 47.579 47.290 0.290 45.339 45.796 0.4578-12 63.452 63.162 0.290 61.214 61.671 0.457 10 21/2公制细牙6g外螺纹大径6H内螺纹小径1 M10*1 9.974 9.794 0.180 8.917 9.157 0.2402 M12*1.5 11.968 11.732 0.236 10.376 10.676 0.3003 M14*1.5 13.968 13.732 0.236 12.376 12.676 0.3004 M16*1.5 15.968 15.732 0.236 14.376 14.676 0.3005 M18*1.5 17.968 17.732 0.236 16.376 16.676 0.3006 M20*1.5 19.968 19.732 0.236 18.376 18.676 0.3007 M22*1.5 21.968 21.732 0.236 20.376 20.676 0.3008 M24*1.5 23.968 23.732 0.236 22.376 22.676 0.3009 M26*1.5 25.968 25.732 0.236 24.376 24.676 0.30010 M27*1.5 26.968 26.732 0.236 25.376 25.676 0.30011 M30*1.5 29.968 29.732 0.236 28.376 28.676 0.30012 M27*2 26.962 26.682 0.280 24.835 25.210 0.37513 M30*2 29.962 29.682 0.280 27.835 28.210 0.37514 M33*2 32.962 32.682 0.280 30.835 31.210 0.37515 M36*2 35.962 35.682 0.280 33.835 34.210 0.37516 M42*2 41.962 41.682 0.280 39.835 40.210 0.375 英制管螺纹1 G1/8-28 9.728 9.514 0.214 8.566 8.848 0.2822 G1/4-19 13.157 12.907 0.250 11.445 11.890 0.4453 G3/8-19 16.662 16.412 0.250 14.950 15.395 0.4454 G1/2-14 20.955 20.671 0.284 18.631 19.172 0.5415 G3/4-14 26.441 26.157 0.284 24.117 24.658 0.5416 G1-11 33.249 32.889 0.360 30.291 30.931 0.6407 G11/-11 41.910 41.550 0.360 38.952 39.592 0.6404-11 47.803 47.443 0.360 44.845 45.485 0.6408 G11/2公制/美制/英制螺纹对照表给大家分享一下 f NpX?,A型美制螺纹（UNF）常用规格-,!3,o iq外螺纹内螺纹UX x^Y2-4 9/16"-19牙14.28 13.08 8-j,M4D*&-6 11/16''-16 17.46 16.1 {lh szc-8 13/16''-16 20.64 19.28 cM iO|N@1-10 1''-14 25.40 23.57 h |t B-12 1(3/16)''-12 30.00 28.32 )Al{84<(}-16 1(7/16)''-12 36.51 34.67 Ys$3}LA{-20 1(11/16)''-12 42.86 41.02 SW7V7S*Qz{Akh02V@C型JIC37度美制UNF螺纹常用规格 (" G'W CLz -4 7/16”-20 11.11 10.03 -e~xb Qr-5 1/2”-20 12.70 11.32-6 9/16”-18 14.28 13.08 NH'YgL6*-8 3/4”-16 19.00 17.68 lxv;6S!J-10 7/8”-14 22.22 20.68 P|J&?KbC-12 1(1/16)"-12 26.98 25.15 Ki; ++-16 1(5/16)"-12 33.33 31.5 ZF!BkZ Uo-20 1(5/8)"-12 41.28 39.44 LX+c Z-24 1(7/8)"-12 47.62 45.8 iDP@c g-32 2(1/2)"-12 63.5 61.67 j/5j@^L\e w;h4y英制圆柱管螺纹（BSPP）常用规格 dApgz U@;-4 1/4”-19 13.157 11.55 |,hu r8BE\-6 3/8”-19 16.662 14.95 @"%@;>W<t< p=""> -8 1/2”-14 20.955 18.63 F)$7 ?')p-12 3/4”-14 26.441 24.11 Q} &f3?-16 1”-11 33.249 30.29 YZ@pwhZ<-20 1(1/4)''-11 41.91 38.95 SmU'a o.\<v{UpdB"]5英制圆锥管螺纹（BSPT）常用规格 b sDck <li< p="">基面大径基准距离 A4<q_07#< p="">1/4”-19 13.157 6}@E K'k3/8”-19 16.662 6.4 .gy5/-.SZ1/2”-14 20.955 8.2 R0?/'gt3/4”-14 26.441 9.5aF4L{'qK1”-11 33.249 10.4Q,Y do1(1/4)''-11 41.91 12.7 i'9m o0bmO@;ir e_^C X "TaT"(1美制圆锥管螺纹（NPT）mJ f1/8”-27 10.24 4 3VYo$g 1/4”-18 13.60 4 L8|v.?J 3/8”-18 17.04 4.32D[-ijs1/2”-14 21.22 4.48"Lx Hg]') 3/4”-14 26.57 4.75 GIry1”-11(1/2)”33.22 4.6 qBc!A~8K4' 1(1/4)”-11.5 41.96 4.83 </q_07#<></li<></t<>。
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。
- 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)。
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-1.2807t
ZG 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。