螺丝攻牙钻孔径和底孔对照表

1、螺螺丝丝攻攻牙牙钻钻孔孔径径对对照照表表公制粗螺纹美制粗螺纹规格底孔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M1.00.250.750.7850.729NO.1-64(1.854)1.551.5821.425M1.10.250.850.8850.829NO.2-56(2.184)1.801.8711.695M1.20.250.950.9850.985NO.3-48(2.515)2.102.1461.941M1.40.31.101.1421.075NO.4-40(2.845)2.302.3852.157M1.60.351.251.3211.221NO.5-40(3.175)2

2、.602.6972.487M1.70.351.351.4211.321NO.6-32(3.505)2.802.8952.642M1.80.351.451.5211.421NO8-32(4.166)3.403.533.302M2.00.41.601.6791.567NO.10-24(4.826)3.903.9623.683M2.20.451.751.8381.713NO.12-24(5.486)4.504.5974.344M2.30.41.901.9791.8671/4-205.105.2574.979M2.50.452.102.1382.0135/16-186.606.7316.401M2.6

3、0.452.202.2382.1133/8-168.008.1537.798M3.00.52.502.5992.4597/16-149.409.559.144M3.00.62.402.4402.2801/2-1310.8011.02310.592M3.50.62.903.0102.8509/16-1212.2012.44611.989M4.00.73.303.4223.2425/8-1113.6012.86813.386M4.00.753.253.3263.1063/4-1016.5018.84016.307M4.50.753.803.8783.6887/8-919.5019.76119.17

4、7M5.00.84.204.3344.134122.2022.60621.971M5.00.94.104.1703.9301-1/8-725.0025.34924.638M6.01.05.005.1534.9171-1/4-728.2028.52427.813M7.01.06.006.1535.9171-3/8-630.8031.11530.353M8.01.256.806.9126.6471-1/2-634.0034.29033.528M9.01.257.807.9127.6471-3/4-539.5039.82738.964M101.58.508.6768.3762-4-1/245.204

5、5.59344.679M111.59.509.6769.376M121.7510.3010.44110.106M142.012.0012.21011.835M162.014.0014.21013.835M182.515.5015.74415.294M202.517.5017.74417.294M222.519.5019.74419.294M243.021.0021.25220.752M273.024.0024.25223.752M303.526.5026.77126.211螺螺丝丝攻攻牙牙钻钻孔孔径径对对照照表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

6、最大最小M1.00.20.800.8210.783NO.0-80(1.524)1.251.3051.182M1.10.20.900.9210.883NO.1-72(1.854)1.551.6121.474M1.20.21.001.0210.983NO.2-64(2.184)1.851.9121.756M1.40.21.201.2211.183NO.3-56(2.515)2.102.1972.025M1.60.21.401.4211.383NO.4-48(2.845)2.402.4582.271M1.70.21.451.5001.460NO.5-44(3.175)2.702.7402.551M1

7、.80.21.601.6211.583NO.6-40(3.505)2.903.0222.820M2.00.251.751.7851.729NO.8-36(4.166)3.503.6063.404M2.20.251.951.9851.929NO.10-32(4.826)4.104.1653.963M2.30.252.052.0612.001NO.12-28(5.846)4.604.7244.496M2.50.352.202.2212.1211/4-285.505.5885.360M2.60.352.202.2462.1865/16-246.907.0356.782M3.00.352.702.72

8、12.6213/8-248.508.6368.382M3.50.353.203.2213.1217/16-209.9010.0339.729M4.00.53.503.5993.4591/2-2011.5011.60711.329M4.50.54.004.0993.9599/16-1812.9013.08112.751M5.00.54.504.5994.4595/8-1814.5014.68114.351M5.50.55.005.0994.9593/4-1617.5017.67817.323M6.00.755.305.3785.1887/8-1420.5020.67520.270M6.00.55

9、.505.5505.4001-1223.2023.57123.114M7.00.756.306.3786.1881-1/8-1226.5026.74626.289M7.00.56.506.5506.4001-1/4-1229.5029.92129.464螺螺丝丝攻攻牙牙钻钻孔孔径径和和滚滚造造径径对对照照表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M8.01.07.007.1536.9171-3/8-1232.8033.09632.639M8.00.757.307.3787.1881-1/2-1236.0036.27135.814M8.00.5

10、7.507.5207.400M9.01.08.008.1537.917M9.00.758.308.3788.188M101.258.808.9128.647M101.09.009.1538.917M100.759.309.3789.188M100.59.509.5209.400M111.010.0010.1539.917M110.7510.3010.37810.188M121.510.5010.67610.376M121.2510.8010.91210.647M121.011.0011.15310.917M120.511.5011.52011.400M141.512.5012.67612.37

11、6M141.013.0013.15312.917M151.513.5013.67613.376M151.014.0014.15313.917M161.514.5014.67614.376M161.015.0015.15314.917M171.515.5015.67615.376螺螺丝丝攻攻牙牙钻钻孔孔径径和和滚滚造造径径对对照照表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M171.016.0016.15315.917M182.016.0016.21015.835M181.516.5016.67616.376M181.017.0017.15316

12、.917M202.018.0018.21017.835M201.518.5018.67618.376M201.019.0019.15318.917M222.020.0020.21019.835M221.520.5020.67620.376M221.021.0021.15320.917M242.022.0022.21021.835M241.522.5022.67622.376M241.023.0023.15322.917M252.023.0023.21022.835M251.523.5023.67623.376M251.024.0024.15323.917M261.524.5024.67624.

13、376M272.025.0025.21024.835M271.525.5025.67625.376M271.026.0026.15325.917M282.026.0026.21025.835M281.526.5026.67626.376螺螺丝丝攻攻牙牙钻钻孔孔径径和和滚滚造造径径对对照照表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M281.027.0027.15326.917M303.027.0027.25226.752M302.028.0028.21027.835M301.528.5028.67628.376M301.029.0029.153

14、28.917M322.030.0030.21029.835M321.530.5030.67630.376M333.030.0030.25229.752M332.031.0031.21030.835M331.531.5031.67631.376M351.533.5033.67633.376M363.033.0033.25232.752M362.034.0034.21033.835M361.534.5034.67634.376螺螺丝丝攻攻牙牙钻钻孔孔径径对对照照表表公制迫牙丝攻钻孔径美制迫牙丝攻钻孔径规格精度等级规格精度等级G4-G6G7-G8G9G4-G6G7-G8G9M1.00.250.860

15、.88NO.2-56UNC1.94M1.10.250.960.98NO.3-482.23M1.20.251.061.08NO.4-402.50M1.40.31.241.25NO.5-402.83M1.60.351.411.43NO.6-323.07M1.70.351.511.53NO.8-323.733.77M1.80.351.611.63NO.10-244.244.3M2.00.41.781.80NO.12-244.904.96M2.20.451.951.981/4-205.72M2.30.42.082.105/16-187.24M2.50.452.252.283/8-168.748.81M

16、2.60.452.352.387/16-1410.2010.30M3.00.52.732.751/2-1311.2711.82M3.50.63.173.20NO.2-64UNF1.97M4.00.73.623.653.69NO.3-562.27M5.00.84.564.604.64NO.4-482.56M6.01.05.455.505.55NO.5-442.86M7.01.06.456.506.55NO.6-403.16M8.01.257.317.387.44NO.8-363.78M101.59.189.259.32NO.10-324.394.43M101.259.319.389.44NO.1

17、2-284.995.04M121.7511.0411.1211.211/4-285.855.90M121.2511.3111.3811.445/16-247.367.413/8-249.007/16-2010.4810.541/2-2012.0712.13美制特细螺纹英制电器螺纹规格(UNEF)标准径2级牙钻孔径规格钻孔径最大最小NO.12-324.704.8264.6232BA4.0-4.21/4 -325.605.6905.4863BA5/16 -327.107.2647.0874BA3.0-3.23/8 -328.708.8658.6615BA2.7-2.87/16 -2810.2010

18、.33810.1356BA2.4-2.51/2 -2811.8011.93811.7099/16 -2413.2013.38613.1325/8 -2414.8014.98614.7323/4 -2017.8017.95817.6787/8 -2021.0021.13320.8531 -2024.0024.30824.028螺螺丝丝攻攻牙牙钻钻孔孔径径对对照照表表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纹刀时不用纹刀时NPTNPS使用绞刀时不用绞刀时PS 1/16 - 286.506.632

19、6.490PT 1/16 - 286.106.206.2446.3841/16 - 276.106.256.35PS 1/8 - 288.508.6378.495PT 1/8 - 288.108.208.2498.3881/8 - 278.338.438.74PS 1/4 - 1911.4011.54911.341PT 1/4 - 1910.7011.0010.96211.1741/4 - 1810.7211.1311.13PS 3/8 - 1915.0015.05414.846PT 3/8 - 1914.2014.5014.44814.6583/8 - 1814.2714.2714.68PS

20、 1/2 - 1418.5018.77318.489PT 1/2 - 1417.6018.0017.97918.2631/2 - 1417.4817.8618.26PS 3/4 -1424.0024.25923.975PT 3/4 - 1423.0023.5023.37823.6633/4 - 1422.6323.0123.42PS 1 - 1130.2030.47130.111PT 1- 1129.0029.5029.45929.8221 - 11-1/228.5828.9829.36PS 1-1/4 - 1138.8039.13238.772PT 1-1/4 - 1137.5038.003

21、7.97638.3391-1/4-11-1/237.3137.6938.10PS 1-1/2 - 1144.8045.02544.665PT 1-1/2 - 1143.4044.0043.86944.2321-1/2-11-1/243.6644.0444.45PS 2 - 1156.5056.83656.476PT 2 - 1154.9055.5055.41255.8442 - 11 - 1/255.5855.9656.36螺螺丝丝攻攻牙牙钻钻孔孔径径对对照照表表英制螺纹公制螺纹针车用螺纹规格(UNEF)钻孔径规格滚造径规格滚造径硬材软材W 1/8 - 402.652.60M30.52.63-2.60SM1/8-402.735-2.688W 5/32 - 323.253.20M3.00.62.56-2.53SM1/8-442.769-2.722W 3/16 - 243.