螺絲攻牙鉆孔徑和底孔對照表

1、螺螺絲絲攻攻牙牙鉆鉆孔孔徑徑對對照照表表公制粗螺紋美制粗螺紋規(guī)格底孔2級牙鉆孔徑規(guī)格（UNC）標準徑2級牙鉆孔徑最大最小最大最小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螺螺絲絲攻攻牙牙鉆鉆孔孔徑徑對對照照表表公制細螺紋美制細螺紋規(guī)格標準徑2級牙鉆孔徑規(guī)格（UNC）標準徑2級牙鉆孔徑最大最小

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螺螺絲絲攻攻牙牙鉆鉆孔孔徑徑和和滾滾造造徑徑對對照照表表公制細螺紋美制細螺紋規(guī)格標準徑2級牙鉆孔徑規(guī)格（UNC）標準徑2級牙鉆孔徑最大最小最大最小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螺螺絲絲攻攻牙牙鉆鉆孔孔徑徑和和滾滾造造徑徑對對照照表表公制細螺紋美制細螺紋規(guī)格標準徑2級牙鉆孔徑規(guī)格（UNC）標準徑2級牙鉆孔徑最大最小最大最小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螺螺絲絲攻攻牙牙鉆鉆孔孔徑徑和和滾滾造造徑徑對對照照表表公制細螺紋美制細螺紋規(guī)格標準徑2級牙鉆孔徑規(guī)格（UNC）標準徑2級牙鉆孔徑最大最小最大最小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螺螺絲絲攻攻牙牙鉆鉆孔孔徑徑對對照照表表公制迫牙絲攻鉆孔徑美制迫牙絲攻鉆孔徑規(guī)格精度等級規(guī)格精度等級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美制特細螺紋英制電器螺紋規(guī)格(UNEF)標準徑2級牙鉆孔徑規(guī)格鉆孔徑最大最小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螺螺絲絲攻攻牙牙鉆鉆孔孔徑徑對對照照表表英制管螺紋英制管螺紋美制管螺紋規(guī)格標準徑鉆孔徑規(guī)格標準徑有交牙部之長度（最小）中之毋螺牙內(nèi)徑標準長度（最?。┲兄懵菅纼?nèi)徑規(guī)格鉆孔徑最大最小使用紋刀時不用紋刀時NPTNPS使用絞刀時不用絞刀時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螺螺絲絲攻攻牙牙鉆鉆孔孔徑徑對對照照表表英制螺紋公制螺紋針車用螺紋規(guī)格(UNEF)鉆孔徑規(guī)格滾造徑規(guī)格滾造徑硬材軟材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.