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标准螺纹尺寸对照表

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标准螺纹尺寸对照表

螺纹连接是机械制造中常见的连接方式，它通过螺纹的升降运动，实现零件之间的紧固和分离。在实际生产中，我们经常会遇到各种各样的螺纹尺寸，而了解这些标准螺纹尺寸对照表对于正确选择、加工和使用螺纹连接零件至关重要。本文将介绍常见的标准螺纹尺寸对照表，帮助大家更好地理解和应用螺纹连接。

1. 公制螺纹尺寸对照表。

公制螺纹是指按照国际标准制定的螺纹尺寸，通常用于机械制造中。公制螺纹的尺寸包括直径、螺距、牙型角等参数。常见的公制螺纹尺寸对照表包括M1-M68，其中M表示公制螺纹，数字表示直径大小。例如，M8表示直径为8mm的公制螺纹。

2. 英制螺纹尺寸对照表。

英制螺纹是指按照英国标准制定的螺纹尺寸，通常用于一些特殊的机械设备中。英制螺纹的尺寸包括直径、螺距、牙型角等参数。常见的英制螺纹尺寸对照表包括UNC、UNF、BSW、BSF等。例如，UNC表示粗牙螺纹，UNF表示细牙螺纹，BSW表示英制圆柱螺纹，BSF表示英制锥度螺纹。

3. 螺纹尺寸的选择和应用。

在实际生产中，正确选择螺纹尺寸对于保证零件的连接质量至关重要。首先，需要根据零件的使用环境和载荷大小选择合适的螺纹尺寸，以确保连接的牢固性和稳定性。其次，需要根据螺纹连接的需求选择合适的螺纹类型，包括内螺纹、外螺纹、粗牙螺纹、细牙螺纹等。最后，需要根据加工工艺和设备选择合适的螺纹加工工具和设备，以确保螺纹的加工质量和精度。

4. 螺纹尺寸对照表的应用案例。 以M8螺纹为例，其标准螺距为1.25mm，牙型角为60度。在实际生产中，我们可以根据这些参数选择合适的螺纹加工工具和设备，进行螺纹的加工和加工质量的检验。同时，我们还可以根据这些参数选择合适的螺纹连接零件，进行螺纹连接的组装和调试。

5. 结语。

标准螺纹尺寸对照表是机械制造中重要的参考依据，正确理解和应用螺纹尺寸对照表对于保证零件连接质量和稳定性至关重要。希望本文介绍的内容能够帮助大家更好地理解和应用螺纹连接，提高螺纹连接零件的加工质量和使用性能。

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美制螺纹标准对照表

美制螺纹标准对照表

美制螺纹标准对照表

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 螺胚直径

最小 最大 最小 最大 最小 最大

8-32

UNC 0.1571 0.1631 0.1399 0.1428 0.1248 3.58 3.61 (0.164-32) 3.9903 4.1427 3.5535 3.6271 3.1699

10-24 0.1818 0.1890 0.1586 0.1619 0.1379 4.07 4.10 (0.190-24) 4.6177 4.8006 4.0284 4.1123 3.5027

12-24 0.2078 0.2150 0.1845 0.1879 0.1639 4.72 4.75 (0.216-24) 5.2781 5.4610 4.6863 4.7727 4.1631

1/4-20 0.2408 0.2489 0.2127 0.2164 0.1876 5.45 5.48 (0.250-20) 6.1163 6.3221 5.4026 5.4966 4.7650

5/16-18 0.3026 0.3113 0.2712 0.2752 0.2431 6.94 6.98 (0.3175-18) 7.6860 7.9070 6.8885 6.9901 6.1747

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 7.5438

7/16-14 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 8.8519

1/2-13 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 10.2641

螺纹规格对照表

螺纹规格对照表

螺纹底孔径

公制粗牙螺纹 JIS B 0209-1982(单位：mm)

螺纹尺寸 钻头直径

崁合度区分：中(注1)2级(注2)

下孔径

崁合度区分：中(注1)2级(注2)

内螺纹小径

最小直径 最大直径

M 1 0.78 (80%)

0.88 (80%)

0.98 (80%)

1.14 (80%)

1.32 (75%)

1.52 (75%)

2 1.65 (80%)

1.83 (75%)

2.13 (75%)

3 2.59 (75%)

3.01 (75%)

4 3.39 (80%)

3.85 (80%)

5 4.31 (80%)

6 × 1 5 5.13 (80%)

7 × 1 6 6.13 (80%)

8 6.85 (85%)

9 7.85 (85%)

10 8.62 (85%)

11 9.62 (85%)

12 10.40 (85%)

14 × 2 12 12.2 (85%)

16 × 2 14 14.2 (85%)

18 15.7 (85%)

20 17.7 (85%)

22 19.2 (85%)

24 × 3 21 21.2 (85%)

27 × 3 24 24.2 (85%)

30 26.6 (90%)

33 29.6 (90%)

36 × 4 32 32.1 (90%)

39 × 4 35 35.1 (90%)

37.6 (90%)

40.6 (90%)

螺纹基本尺寸对照表

螺纹基本尺寸对照表

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英制管螺纹基本尺寸及公差（牙形角55º） BSPP

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美制管螺纹基本尺寸及公差（牙形角60º） UN(F)

最全的螺纹孔径对照表(公制-英制)

最全的螺纹孔径对照表(公制-英制)

最大最小最大最小G4-G6G7-G8G9M1.0*0.250.750.7850.729M12*1.011.0011.15310.917M1.0*0.250.860.88M1.1*0.250.850.8850.829M12*0.511.5011.52011.400M1.1*0.250.960.98最大M1.2*0.250.950.9850.929M14*1.512.5012.67612.376M1.2*0.251.061.08G 1/167.726.84M1.4*0.31.101.1421.075M14*1.013.0013.15312.917M1.4*0.31.241.25G(PF)1/89.738.85M1.6*0.351.251.3211.221M15*1.513.5013.67613.376M1.6*0.351.411.431/413.1611.89M1.7*0.351.351.4211.321M15*1.014.0014.15313.917M1.7*0.351.511.533/816.6615.40M1.8*0.351.451.5211.421M16*1.514.5014.67614.376M1.8*0.351.611.631/220.9619.17M2.0*0.41.601.6791.567M16*1.015.0015.15314.917M2*0.41.781.805/822.9121.13M2.2*0.451.751.8381.713M17*1.515.5015.67615.376M2.2*0.451.951.983/426.4424.66M2.3*0.41.901.9791.867M17*1.016.0016.15315.917M2.3*0.42.082.107/830.2028.42M2.5*0.452.102.1382.013M18*2.016.0016.21015.835M2.5*0.452.252.28133.2530.93M2.6*0.452.202.2382.113M18*1.516.5016.67616.376M2.6*0.452.352.381.12537.9035.58M3.0*0.52.502.5992.459M18*1.017.0017.15316.917M3.0*0.52.732.751.2541.9139.59M3.0*0.62.402.4402.280M20*2.018.0018.21017.835M3.5*0.63.173.201.37544.3242.01M3.5*0.62.903.0102.850M20*1.518.5018.67618.376M4.0*0.73.623.653.691.547.8049.02M4.0*0.73.303.4223.242M20*1.019.0019.15318.917M5.0*0.84.564.604.641.62551.9150.79M4.0*0.753.253.3263.106M22*2.020.0020.21019.835M6.0*1.05.455.505.551.7553.7556.66M4.5*0.753.803.8783.688M22*1.520.5020.67620.376M7.0*1.06.456.506.55259.61M5.0*0.84.204.3344.134M22*1.021.0021.15320.917M8.0*1.257.317.387.44M5.0*0.94.104.1703.930M24*2.022.0022.21021.835M10*1.59.189.259.32M6.0*1.05.005.1534.917M24*1.522.5022.67622.376M10*1.259.319.389.44M7.0*1.06.006.1535.917M24*1.023.0023.15322.917M12*1.7511.0411.1211.21M8.0*1.256.806.9126.647M25*2.023.0023.21022.835M12*1.2511.3111.3811.44M9.0*1.257.807.9127.647M25*1.523.5023.67623.376最大M10*1.58.508.6768.376M25*1.024.0024.15323.917PS 1/16 - 286.506.632M11*1.59.509.6769.376M26*1.524.5024.67624.376PS 1/8 - 288.508.637M12*1.7510.3010.44110.106M27*2.025.0025.21024.835PS 1/4 - 1911.4011.549M14*2.012.0012.21011.835M27*1.525.5025.67625.376PS 3/8 - 1915.0015.054M16*2.014.0014.21013.835M27*1.026.0026.15325.917PS 1/2 - 1418.5018.773M18*2.515.5015.74415.294M28*2.026.0026.21025.835PS 3/4 - 1424.0024.259M20*2.517.5017.74417.294M28*1.526.5026.67626.376PS 1 - 1130.2030.471M22*2.519.5019.74419.294M28*1.027.0027.15326.917规格PS 1-1/4 - 1138.8039.132M24*3.021.0021.25220.752M30*3.027.0027.25226.752(UNC)最大最小PS 1-1/2 - 1144.8045.025M27*3.024.0024.25223.752M30*2.028.0028.21027.835 (螺丝牙外径)PS 2 - 1156.5056.836M30*3.526.5026.77126.211M30*1.528.5028.67628.376No.1-64(1.854)1.551.5821.425M30*1.029.0029.15328.917No.2-56(2.184)1.801.8711.695M32*2.030.0030.21029.835No.3-48(2.515)2.102.1461.941M32*1.530.5030.67630.376No.4-40(2.845)2.302.3852.157M33*3.030.0030.25229.752No.5-40(3.175)2.602.6972.487M33*2.031.0031.21030.835No.6-32(3.505)2.802.8952.642最大最小M33*1.531.5031.67631.376No.8-32(4.166)3.403.5303.302M1.0*0.20.800.8210.783M35*1.533.5033.67633.376No.10-24(4.826)3.903.9623.683M1.1*0.20.900.9210.883M36*3.033.0033.25232.752No.12-24(5.486)4.504.5974.344PT 1/16 -286.106.206.2446.384M1.2*0.21.001.0210.983M36*2.034.0034.21033.8351/4 - 205.105.2574.979PT 1/8 -288.108.208.4298.388M1.4*0.21.201.2211.183M36*1.534.5034.67634.3765/16 - 186.606.7316.401PT 1/4 -1910.7011.0010.96211.174M1.6*0.21.401.4211.3833/8 - 168.008.1537.798PT 3/8 -1914.2014.5014.44814.658M1.7*0.21.451.5001.4607/16 - 149.409.5509.144PT 1/2 -1417.6018.0017.97918.263M1.8*0.21.601.6211.5831/2 - 1310.8011.02310.592PT 3/4 -1423.0023.5023.37823.663M2.0*0.251.751.7851.7299/16 - 1212.2012.44611.989PT 1 -1129.0029.5029.45929.822M2.2*0.251.951.9851.929规格5/8 - 1113.6012.86813.386PT 1-1/4 -1137.5038.0037.97638.339M2.3*0.252.052.0612.001(UNF)最大最小3/4 - 1016.5018.84016.307PT 1-1/2 -1143.4044.0043.86944.232M2.5*0.352.202.2212.1217/8 - 919.5019.76119.177PT 2 -1154.9055.5055.41255.844M2.6*0.352.202.2462.186No.0-80(1.524)1.251.3051.1821 - 822.2022.60621.971M3.0*0.352.702.7212.621No.1-72(1.854)1.551.6121.4741-1/8 - 725.0025.34924.638M3.5*0.353.203.2213.121No.2-64(2.184)1.851.9121.7561-1/4 - 728.2028.52427.813M4.0*0.53.503.5993.459No.3-56(2.515)2.102.1972.0251-3/8 - 630.8031.11530.353M4.5*0.54.004.0993.959No.4-48(2.845)2.402.4582.2711-1/2 - 634.0034.29033.528M5.0*0.54.504.5994.459No.5-44(3.175)2.702.7402.5511-3/4 - 539.5039.82738.964M5.5*0.55.005.0994.959No.6-40(3.505)2.903.0222.8202 - 4-1/245.2045.59344.679使用绞刀时不用绞刀时M6.0*0.755.305.3785.188No.8-36(4.166)3.503.6063.4041/16 - 276.106.25M6.0*0.55.505.5505.400No.10-32(4.826)4.104.1653.9631/8 -278.338.43M7.0*0.756.306.3786.188No.12-28(5.846)4.604.7244.4961/4 -1810.7211.13M7.0*0.56.506.5506.4001/4 - 285.505.5885.3603/8 -1814.2714.27M8.0*1.07.007.1536.9175/16 - 246.907.0356.782规格1/2 -1417.4817.86M8.0*0.757.307.3787.1883/8 - 248.508.6368.382(UNEF)最大最小3/4 -1422.6323.01M8.0*0.57.507.5207.4007/16 - 209.9010.0339.729No.12 - 324.704.8264.6231 -11-1/228.5828.98M9.0*1.08.008.1537.9171/2 - 2011.5011.60711.3291/4 - 325.605.6905.4861-1/4 -11-1/237.3137.69M9.0*0.758.308.3788.1889/16 - 1812.9013.08112.7515/16 - 327.107.2647.0871-1/2 -11-1/243.6644.04M10*1.258.808.9128.4675/8 - 1814.5014.68114.3513/8 - 328.708.8658.6612 -11-1/255.5855.96M10*1.09.009.1538.9173/4 - 1617.5017.67817.3237/16 - 2810.2010.33810.135M10*0.759.309.3789.1887/8 - 1420.5020.67520.2701/2 - 2811.8011.93811.709M10*0.59.509.5209.4001 - 1223.2023.57123.1149/16 - 2413.2013.38613.132M11*1.010.0010.1539.9171-1/8 - 1226.5026.74626.2895/8 - 2414.8014.98614.732M11*0.7510.3010.37810.1881-1/4 - 1229.5029.92129.4643/4 - 2017.8017.95817.678M12*1.510.5010.67610.3761-3/8 - 1232.8033.09632.6397/8 - 2021.0021.13320.853M12*1.2510.8010.91210.6471-1/2 - 1236.036.27135.8141 - 2024.0024.30824.028标准径2级牙钻孔径