螺丝攻牙钻孔径和滚丝径对照表

1、螺丝攻牙钻孔径和滚丝径对照表 公制粗螺纹 美制粗螺纹 规格标准径2级牙钻孔径规格（unc）标准径2级牙钻孔径最大最小最大最小m1.0×0.250.750.7850.729no.1-64(1.854)1.551.5821.425m1.1×0.250.850.8850.829no.2-56(2.184)1.801.8711.695m1.2×0.250.950.9850.985no.3-48(2.515)2.102.1461.941m1.4×0.31.101.1421.075no.4-40(2.845)2.302.3852.157m1.6×0.351

2、.251.3211.221no.5-40(3.175)2.602.6972.487m1.7×0.351.351.4211.321no.6-32(3.505)2.802.8952.642m1.8×0.351.451.5211.421no8-32(4.166)3.403.533.302m2.0×0.41.601.6791.567no.10-24(4.826)3.903.9623.683m2.2×0.451.751.8381.713no.12-24(5.486)4.504.5974.344m2.3×0.41.901.9791.8671/4-205.1

3、05.2574.979m2.5×0.452.102.1382.0135/16-186.606.7316.401m2.6×0.452.202.2382.1133/8-168.008.1537.798m3.0×0.52.502.5992.4597/16-149.409.559.144m3.0×0.62.402.4402.2801/2-1310.8011.02310.592m3.5×0.62.903.0102.8509/16-1212.2012.44611.989m4.0×0.73.303.4223.2425/8-1113.6012.868

4、13.386m4.0×0.753.253.3263.1063/4-1016.5018.84016.307m4.5×0.753.803.8783.6887/8-919.5019.76119.177m5.0×0.84.204.3344.134122.2022.60621.971m5.0×0.94.104.1703.9301-1/8-725.0025.34924.638m6.0×1.05.005.1534.9171-1/4-728.2028.52427.813m7.0×1.06.006.1535.9171-3/8-630.8031.1153

5、0.353m8.0×1.256.806.9126.6471-1/2-634.0034.29033.528m9.0×1.257.807.9127.6471-3/4-539.5039.82738.964m10×1.58.508.6768.3762-4-1/245.2045.59344.679m11×1.59.509.6769.376m12×1.7510.3010.44110.106m14×2.012.0012.21011.835m16×2.014.0014.21013.835m18×2.515.5015.74415.2

6、94m20×2.517.5017.74417.294m22×2.519.5019.74419.294m24×3.021.0021.25220.752m27×3.024.0024.25223.752m30×3.526.5026.77126.211 螺丝攻牙钻孔径和滚丝径对照表 公制细螺纹 美制细螺纹 规格标准径2级牙钻孔径规格（unc）标准径2级牙钻孔径最大最小最大最小m1.0×0.20.800.8210.783no.0-80(1.524)1.251.3051.182m1.1×0.20.900.9210.883no.1-72(

7、1.854)1.551.6121.474m1.2×0.21.001.0210.983no.2-64(2.184)1.851.9121.756m1.4×0.21.201.2211.183no.3-56(2.515)2.102.1972.025m1.6×0.21.401.4211.383no.4-48(2.845)2.402.4582.271m1.7×0.21.451.5001.460no.5-44(3.175)2.702.7402.551m1.8×0.21.601.6211.583no.6-40(3.505)2.903.0222.820m2.0&

8、#215;0.251.751.7851.729no.8-36(4.166)3.503.6063.404m2.2×0.251.951.9851.929no.10-32(4.826)4.104.1653.963m2.3×0.252.052.0612.001no.12-28(5.846)4.604.7244.496m2.5×0.352.202.2212.1211/4-285.505.5885.360m2.6×0.352.202.2462.1865/16-246.907.0356.782m3.0×0.352.702.7212.6213/8-248.50

9、8.6368.382m3.5×0.353.203.2213.1217/16-209.9010.0339.729m4.0×0.53.503.5993.4591/2-2011.5011.60711.329m4.5×0.54.004.0993.9599/16-1812.9013.08112.751m5.0×0.54.504.5994.4595/8-1814.5014.68114.351m5.5×0.55.005.0994.9593/4-1617.5017.67817.323m6.0×0.755.305.3785.1887/8-1420.50

10、20.67520.270m6.0×0.55.505.5505.4001-1223.2023.57123.114m7.0×0.756.306.3786.1881-1/8-1226.5026.74626.289m7.0×0.56.506.5506.4001-1/4-1229.5029.92129.464m8.0×1.07.007.1536.9171-3/8-1232.8033.09632.639m8.0×0.757.307.3787.1881-1/2-1236.0036.27135.814m8.0×0.57.507.5207.400m9.

11、0×1.08.008.1537.917m9.0×0.758.308.3788.188m10×1.258.808.9128.647m10×1.09.009.1538.917m10×0.759.309.3789.188m10×0.59.509.5209.400m11×1.010.0010.1539.917m11×0.7510.3010.37810.188m12×1.510.5010.67610.376m12×1.2510.8010.91210.647m12×1.011.0011.15310

12、.917m12×0.511.5011.52011.400m14×1.512.5012.67612.376m14×1.013.0013.15312.917m15×1.513.5013.67613.376m15×1.014.0014.15313.917m16×1.514.5014.67614.376m16×1.015.0015.15314.917m17×1.515.5015.67615.376m17×1.016.0016.15315.917m18×2.016.0016.21015.835m18

13、15;1.516.5016.67616.376m18×1.017.0017.15316.917m20×2.018.0018.21017.835m20×1.518.5018.67618.376m20×1.019.0019.15318.917m22×2.020.0020.21019.835m22×1.520.5020.67620.376m22×1.021.0021.15320.917m24×2.022.0022.21021.835m24×1.522.5022.67622.376m24×1.023.0

14、023.15322.917m25×2.023.0023.21022.835m25×1.523.5023.67623.376m25×1.024.0024.15323.917m26×1.524.5024.67624.376m27×2.025.0025.21024.835m27×1.525.5025.67625.376m27×1.026.0026.15325.917m28×2.026.0026.21025.835m28×1.526.5026.67626.376m28×1.027.0027.15326.

15、917m30×3.027.0027.25226.752m30×2.028.0028.21027.835m30×1.528.5028.67628.376m30×1.029.0029.15328.917m32×2.030.0030.21029.835m32×1.530.5030.67630.376m33×3.030.0030.25229.752m33×2.031.0031.21030.835m33×1.531.5031.67631.376m35×1.533.5033.67633.376m36

16、5;3.033.0033.25232.752m36×2.034.0034.21033.835m36×1.534.5034.67634.376 螺丝攻牙钻孔径和滚丝径对照表 公制挤压丝攻钻孔径 美制挤压丝攻钻孔径 规格精度等级规格（unc）精度等级g4-g6g7-g8g9g4-g6g7-g8g9m1.0×0.250.860.88no.2-56unc1.94m1.1×0.250.960.98no.3-482.23m1.2×0.251.061.08no.4-402.50m1.4×0.31.241.25no.5-402.83m1.6×

17、;0.351.411.43no.6-323.07m1.7×0.351.511.53no.8-323.733.77m1.8×0.351.611.63no.10-244.244.3m2.0×0.41.781.80no.12-244.904.96m2.2×0.451.951.981/4-205.72m2.3×0.42.082.105/16-187.24m2.5×0.452.252.283/8-168.748.81m2.6×0.452.352.387/16-1410.2010.30m3.0×0.52.732.751/2-1

18、311.2711.82m3.5×0.63.173.20no.2-64unf1.97m4.0×0.73.623.653.69no.3-562.27m5.0×0.84.564.604.64no.4-482.56m6.0×1.05.455.505.55no.5-442.86m7.0×1.06.456.506.55no.6-403.16m8.0×1.257.317.387.44no.8-363.78m10×1.59.189.259.32no.10-324.394.43m10×1.259.319.389.44no.12-28

19、4.995.04m12×1.7511.0411.1211.211/4-285.855.90m12×1.2511.3111.3811.445/16-247.367.413/8-249.007/16-2010.4810.541/2-2012.0712.13 美制特细螺纹 英制电器螺纹 规格 标准径 2级牙钻孔径 规格 钻孔径 最大 最小 no.12-32 4.70 4.826 4.623 2ba 4.0-4.2 1/4 -32 5.60 5.690 5.486 3ba 5/16 -32 7.10 7.264 7.087 4ba 3.0-3.2 3/8 -32 8.70 8.86

20、5 8.661 5ba 2.7-2.8 7/16 -28 10.20 10.338 10.135 6ba 2.4-2.5 1/2 -28 11.80 11.938 11.709 9/16 -24 13.20 13.386 13.132 5/8 -24 14.80 14.986 14.732 3/4 -20 17.80 17.958 17.678 7/8 -20 21.00 21.133 20.853 1 -20 24.00 24.308 24.028 螺丝攻牙钻孔径和滚丝径对照表 英制螺纹 公制螺纹 针车用螺纹 规格(unef) 钻孔径 规格 滚丝径 规格 滚丝径 硬材 软材 w 1/8 -

21、40 2.65 2.60 m3×0.5 2.63-2.60 sm1/8-40 2.735-2.688 w 5/32 - 32 3.25 3.20 m3.0×0.6 2.56-2.53 sm1/8-44 2.769-2.722 w 3/16 - 24 3.75 3.70 m3.5×0.6 3.06-3.03 sm9/64-40 3.128-3.083 w 1/4 - 20 5.10 5.00 m4.0×0.7 3.49-3.45 sm11/64-40 3.855-3.805 w 5/16 - 18 6.60 6.50 m4.0×0.75 3.45

22、-3.41 sm3/16-32 4.205-4.155 w 3/8 - 16 8.00 7.90 m4.5×0.75 3.96-3.92 sm3/16-28 4.143-4.093 w 7/16 - 14 9.40 9.30 m5.0×0.8 4.43-4.38 sm7/32-32 5.003-4.955 w 1/2 - 12 10.70 10.50 m5.0×0.9 4.36-4.31 sm15/64-28 5.325-5.570 w 9/16 - 12 12.30 12.00 m6.0×1.0 5.30-5.25 sm1/4-40 5.890-5.7

23、35 w 5/8 - 11 13.70 13.50 m7.0×1.0 6.30-6.25 sm1/4-28 5.721-5.366 w 3/4 - 10 16.70 16.50 m8.0×1.0 7.28-7.23 sm9/32-28 6.508-6.648 w 7/8 - 9 19.50 19.30 m8.0×1.25 7.12-7.07 sm11/32-28 8.092-8.432 w1 - 8 22.40 22.00 sm3/8-28 8.880-8.015 w 1-1/8 - 7 25.00 24.80 sm7/16-28 10.466-10.401 w

24、1 - 1/4 - 7 28.30 28.00 sm7/16-16 10.037-9.967 sm1/2-20 11.819-11.749 sm9/26-20 13.400-13.425 英制管螺纹 英制管螺纹 美制管螺纹 规格 标准径 钻孔径 规格 标准径 有交牙部之长度（最小）中之毋螺牙内径 标准长度（最小）中之毋螺牙内径 规格 钻孔径 最大 最小 使用绞刀时 不用绞刀时 npt nps 使用绞刀时 不用绞刀时 ps 1/16 - 28 6.50 6.632 6.490 pt 1/16 - 28 6.10 6.20 6.244 6.384 1/16 - 27 6.10 6.25 6.35 ps 1/8 - 28 8.50 8.637 8.495 pt 1/8 - 28 8.10 8.20 8.249 8.388 1/8