各种螺纹规格

1、.本表所推选之钻头孔径，是针对攻牙加工时，能够很容易的了解钻孔直径；而依据市场售之标准钻头所选所的。在使用钻头的情况下，由於钻头的形状及尺寸、精度、被钻孔之材质等，对於所钻孔的尺寸、精度有很大的影响，所以使用本表之钻孔径，若有不当之处，应视实际状况适当的变更钻头直径。本表是依据2级牙制订。公制粗螺纹规 格标 准 径2级牙钻孔径最 大最 小M1.00.250.750.7850.729M1.10.250.850.8850.829M1.20.250.950.9850.929M1.40.31.101.1421.075M1.60.351.251.3211.221M1.70.351.351.4211.32

2、1M1.80.351.451.5211.421M2.00.41.601.6791.567M2.20.451.751.8381.713M2.30.41.901.9791.867M2.50.452.102.1382.013M2.60.452.202.2382.113M3.00.52.502.5992.459M3.00.62.402.4402.280M3.50.62.903.0102.850M4.00.73.303.4223.242M4.00.753.253.3263.106M4.50.753.803.8783.688M5.00.84.204.3344.134M5.00.94.104.1703.93

3、0M6.01.05.005.1534.917M7.01.06.006.1535.917M8.01.256.806.9126.647M9.01.257.807.9127.647M101.58.508.6768.376M111.58.508.6768.376M121.7510.3010.44110.106M142.012.0012.21011.835M162.014.0014.21013.835M182.515.5015.74415.294M202.517.5017.74417.294M222.519.5019.74419.294M243.021.0021.25220.752M273.024.00

4、24.25223.752M303.526.5026.77126.211Page 2 of 10公 制 细 螺 纹规格标准径2级牙钻孔径最大最小M1.00.20.800.8210.783M1.10.20.900.9210.883M1.20.21.001.021.0983M1.40.21.201.2211.183M1.60.21.401.4211.383M1.70.21.451.5001.460M1.80.21.601.6211.583M2.00.251.751.7851.729M2.20.251.951.9851.929M2.30.252.052.0612.001M2.50.352.202.22

5、12.121M2.60.352.202.2462.186M3.00.352.702.7212.621M3.50.353.203.2213.121M4.00.53.503.5993.459M4.50.54.004.0993.959M5.00.54.504.5994.459M5.50.55.005.0994.959M6.00.755.305.3785.188M6.00.55.505.5505.400M7.00.756.306.3786.188M7.00.56.506.5506.400M8.01.07.007.1536.917M8.00.757.307.3787.188M8.00.57.507.52

6、07.400M9.01.08.008.1537.917M9.00.758.308.3788.188M101.258.808.9128.647M101.09.009.1538.917M100.759.309.3789.188M100.59.509.5209.400M111.010.0010.1539.917M110.7510.3010.37810.188M121.510.5010.67610.376M121.2510.8010.91210.647 Page 3 of 10公 制 细 螺 纹规格标准径2级牙钻孔径最大最小M121.011.0011.15310.917M120.511.5011.52

7、011.400M141.512.5012.67612.376M141.013.0013.15312.917M151.513.5013.67613.376M151.014.0014.15313.917M161.514.5014.67614.376M161.015.0015.15314.917M171.515.5015.67615.376M171.016.0016.15315.917M182.016.0016.21015.835M181.516.5016.67616.376M181.017.0017.15317.15316.917M202.018.0018.21017.835M201.518.50

8、18.67618.376M201.019.0019.15318.917M222.020.0020.21019.835M221.520.5020.67620.376M221.021.0021.15320.917M242.022.0022.21021.835M241.522.5022.67622.376M241.023.0023.15322.917M252.023.0023.21022.835M251.523.5023.67623.376M251.024.0024.15323.917M261.524.5024.67624.376M272.025.0025.21024.835M271.525.502

9、5.67625.376M271.026.0026.15325.917M282.026.0026.21025.835M281.526.5026.67626.376M281.027.0027.15326.917M303.027.0027.25226.752M302.028.0028.21027.835M301.528.5028.67628.376Page 4 of 10公 制 细 螺 纹规格标准径2级牙钻孔径最大最小M301.029.0029.15328.917M322.030.0030.21029.835M321.530.5030.67630.376M333.030.0030.25229.752

10、M332.031.0031.21030.835M331.531.5031.67631.376M351.533.5033.67633.376M363.033.0033.25232.752M362.034.0034.21033.835M361.534.5034.67634.376美 制 细 螺 纹规 格（UNF）标 准 径2 级 牙 钻 孔 径最 大最 小No.0-80 (1.524) (螺丝牙外径)径)）1.251.3051.182No.1-72 (1.854)1.551.6121.474No.2-64 (2.184)1.851.9121.756No.3-56 (2.515)2.102.1972

11、.025No.4-48 (2.845)2.402.4582.271No.5-44 (3.175)2.702.7402.551No.6-40 (3.505)2.903.0222.820No.8-36 (4.166)3.503.6063.404No.10-32 (4.826)4.104.1653.963No.12-28 (5.846)4.604.7244.4961/4 - 285.505.5885.3605/16 - 246.907.0356.7823/8 - 248.508.6368.3827/16 - 209.9010.0339.7291/2 - 2011.5011.60711.3299/16

12、 - 1812.9013.08112.7515/8 - 1814.5014.68114.3513/4 - 1617.5017.67817.3237/8 - 1420.5020.67520.2701 - 1223.2023.57123.1141-1/8 - 1226.5026.74626.2891-1/4 1229.5029.92129.464Page 5 of 10美 制 细 螺 纹规 格标 准 径2 级 牙 钻 孔 径最 大最 小1-3/8 - 1232.8033.09632.6391-1/2 - 1236.036.27135.814公制迫牙丝攻钻孔径规 格精 度 等 级G4 G6G7 G8

13、G9M1.00.250.860.88-M1.10.250.960.98-M1.20.251.061.08-M1.40.31.241.25-M1.60.351.411.43-M1.70.351.511.53-M1.80.351.611.63-M2.00.41.781.80-M2.20.451.951.98-M2.30.42.082.10-M2.50.452.252.28-M2.60.452.352.38-M3.00.52.732.75-M3.50.63.173.20-M4.00.73.623.653.69M5.00.84.564.604.64M6.01.05.455.505.55M7.01.06

14、.456.506.55M8.01.257.317.387.44M101.59.189.259.32M101.259.319.389.44M121.7511.0411.1211.21M121.2511.3111.3811.44注：迫牙丝攻之钻孔径，在上表所列之数值，由於被加工材料之材质、硬度、形状、尺寸等之影响，多少会有所变动，因此於参考上表之同时，亦请增减若干。 Page 6 of 10美制粗螺纹规 格（UNC）标 准 径2 级 牙 钻 孔 径最 大最 小No.1 64 (1.854) (螺丝牙外径) 径1.551.5821.425No.2 - 56 (2.184)1.801.8711.695

15、No.3 48 (2.515)2.102.1461.941No.4 40 (2.845)2.302.3852.157No.5 40 (3.175)2.602.6972.487No.6 32 (3.505)2.802.8952.642No.8 32 (4.166)3.403.5303.302No.10 24 (4.826)3.903.9623.683No.12 24 (5.486)4.504.5974.3441/4 - 205.105.2574.9795/16 - 186.606.7316.4013/8 - 168.008.1537.7987/16 - 149.409.5509.1441/2 -

16、 1310.8011.02310.5929/16 - 1212.2012.44611.9895/8 - 1113.6012.86813.3863/4 - 1016.5018.84016.3077/8 9 19.5019.76119.1771 8 22.2022.60621.9711-1/8 7 25.0025.34924.6381-1/4 7 28.2028.52427.8131-3/8 6 30.8031.11530.3531-1/2 6 34.0034.29033.5281-3/4 - 539.5039.82738.9642 4-1/245.2045.59344.679美 制 特 细 螺

17、纹规 格（UNEF）标 准 径2 级 牙 钻 孔 径最 大最 小No.12 32 4.704.8264.6231/4 32 5.605.6905.4865/16 32 7.107.2647.0873/8 - 328.708.8658.6617/16 28 10.2010.33810.1351/2 -2811.8011.93811.7099/16 - 2413.2013.38613.132Page 7 of 10美 制 特 细 螺 纹规 格（UNEF）标 准 径2 级 牙 钻 孔 径最 大最 小5/8 - 2414.8014.986814.732014.98614.7323/4 - 2017.8

18、017.95817.6787/8 - 2021.0021.13320.8531 - 2024.0024.30824.028英 制 管 螺 纹规 格标 准 径钻 孔 径最 大最 小PS 1/16 - 286.506.6326.490PS 1/8 28 8.508.6378.495PS 1/4 19 11.4011.54911.341PS 3/8 19 15.0015.05414.846PS 1/2 14 18.5018.77318.489PS 3/4 - 1424.0024.25923.975PS 1 11 30.2030.47130.111PS 1-1/4 11 38.8039.13238.7

19、72PS 1-1/2 11 44.8045.02544.665PS 2 11 56.5056.83656.476英 制 管 螺 纹规 格标 准 径有效牙部之长度 (最小)中之母螺牙内径标准长度(最小)中之母螺牙内径使用绞刀时不用绞刀时PT 1/16 28 6.106.206.2446.384PT 1/8 28 8.108.208.2498.388PT 1/4 19 10.7011.0010.96211.174PT 3/8 19 14.2014.5014.44814.658PT 1/2 14 17.6018.0017.97918.263PT 3/4 14 23.0023.5023.37823.6

20、63PT 1 11 29.0029.5029.45929.822PT 1-1/4 11 37.5038.0037.97638.339PT 1-1/2 11 43.4044.0043.86944.232PT 2 11 54.9055.5055.41255.844Page 8 of 10美 制 管 螺 纹规 格PS 1/16 - 28钻 孔 径N P TN P S使 用 绞 刀 时不 用 绞 刀 时1/16 27 6.106.256.351/8 27 8.338.438.741/4 18 10.7211.1311.133/8 18 14.2714.2714.681/2 14 17.4817.861

21、8.263/4 14 22.6323.0123.421 11 1/228.5828.9829.361- 1/4 11-1/2 37.3137.6938.101-1/2 - 11-1/2 43.6644.0444.452 11 1/255.5855.9656.36公 制 螺 纹规 格滚 造 径M3 0.52.63 2.60M3.0 0.62.56 2.53M3.5 0.63.06 3.03M4.0 0.73.49 3.45M4.0 0.753.45 3.41M4.5 0.753.96 3.92M5.0 0.84.43 4.38M5.0 0.94.36 4.31M6.0 1.05.30 5.25M

22、7.0 1.06.30 6.25M8.0 1.07.28 7.23M8.0 1.257.12 7.07英 制 螺 纹规 格钻 孔 径硬 材软 材W 1/8 - 402.652.60W 5/32 - 323.253.20W 3/16 - 243.753.70 W 1/4 - 205.105.00W 5/16 - 186.606.50Page 9 of 10英 制 螺 纹规 格钻 孔 径硬 材软 材W 3/8 - 168.007.90W 7/16 - 149.409.30W 1/2 - 1210.7010.50W 9/16 - 1212.3012.00W 5/8 - 1113.7013.50W 3

23、/4 - 1016.7016.50W 7/8 - 919.5019.30W 1 8 22.4022.00W 1-1/8 - 725.0024.80W 1-1/4 - 728.3028.00英 制 电 器 螺 纹规 格钻 孔 径2BA4.0 4.23BA4BA3.0 3.25BA2.7 2.86BA2.4 2.5美制迫牙丝攻钻孔径规 格钻 孔 径G4 G6G7 G8G9No.2 56UNC1.94-No.3 48 2.23-No.4 40 2.50-No.5 40 2.83-No.6 32 3.07-No.8 32 3.733.77-No.10 24 4.244.30-No.12 24 4.90

24、4.96-1/4 20 -5.72-5/16 18 -7.24-3/8 16 -8.748.817/16 14 -10.2010.301/2 - 13-11.2711.82No.2 64UNF1.97-Page 10 of 10美制迫牙丝攻钻孔径规 格钻 孔 径G4 G6G7 G8G9No.3 56 2.27-No.4 48 2.56-No.5 44 2.86-No.6 40 3.16-No.8 36 3.78-No.10 32 4.394.43-No.12 28 4.995.04-1/4 28 5.855.90-5/16 24 7.367.41-3/8 24 -9.00-7/16 20 -1

25、0.4810.541/2 20 -12.0712.13针车用螺纹规 格滚 造 径SM 1/8 40 2.735 2.688SM 1/8 44 2.769 2.722 SM 9/64 40 3.128 3.083 SM 11/64 40 3.855 3.805 SM 3/16 32 4.205 4.155SM 3/16 28 4.143 4.093SM 7/32 32 5.003 4.955SM 15/64 28 5.325 5.570SM 1/4 40 5.890 5.735SM 1/4 28 5.721 5.366SM 9/32 28 6.508 6.648SM 11/32 28 8.092

26、 8.432SM 3/8 28 8.880 8.015SM 7/16 28 10.466 10.401SM 7/16 16 10.037 9.967SM 1/2 20 11.819 11.749SM 9/16 20 13.400 13.425针车用螺纹规 格滚 造 径SM 1/8 40 2.735 2.688SM 1/8 44 2.769 2.722 SM 9/64 40 3.128 3.083 SM 11/64 40 3.855 3.805 SM 3/16 32 4.205 4.155SM 3/16 28 4.143 4.093SM 7/32 32 5.003 4.955SM 15/64 2

27、8 5.325 5.570SM 1/4 40 5.890 5.735SM 1/4 28 5.721 5.366SM 9/32 28 6.508 6.648SM 11/32 28 8.092 8.432SM 3/8 28 8.880 8.015SM 7/16 28 10.466 10.401SM 7/16 16 10.037 9.967SM 1/2 20 11.819 11.749SM 9/16 20 13.400 13.425Page 6 of 10美制粗螺纹规 格（UNC）标 准 径2 级 牙 钻 孔 径最 大最 小No.1 64 (1.854) (螺丝牙外径) 径1.551.5821.425No.2 - 56 (2.184)1.801.8711.695No.3 48 (2.515)2.102.1461.941No.4 40 (2.845)2.302.385