螺丝攻牙钻孔径对照表

规格

精度最大

最小

最大最小

最大最小

最大最小

1 -64UNC G5 1.76 1.68M1.0×0.250.750.7850.729M12×1.011.0011.15310.917(螺丝牙外径)

2 -56G4 2.04 1.96M1.1×0.250.850.8850.829M12×0.511.5011.52011.400No.1-64(1.854) 1.55 1.582 1.425

3 -48G

4 2.3

5 2.25M1.2×0.250.950.9850.929M14×1.512.5012.67612.376No.2-56(2.184) 1.80 1.871 1.695 4 -40G5 2.64 2.54M1.4×0.3 1.10 1.142 1.075M14×1.013.0013.15312.917No.3-48(2.515) 2.10 2.14

6 1.941 5 -40G5 2.9

7 2.87M1.6×0.35 1.25 1.321 1.221M15×1.513.5013.67613.376No.4-40(2.845) 2.30 2.385 2.157 6 -32G5 3.22 3.11M1.7×0.35 1.35 1.421 1.321M15×1.014.0014.15313.917No.5-40(3.175) 2.60 2.697 2.487

8 -32G6 3.8

9 3.78M1.8×0.35 1.45 1.521 1.421M16×1.514.5014.67614.376No.6-32(3.505) 2.80 2.895 2.64210 -24G6 4.44 4.30M2.0×0.4 1.6 1.678 1.567M16×1.015.0015.15314.917No.8-32(4.166) 3.40 3.530 3.30212 -24G6 5.07 4.96M2.2×0.45 1.75 1.838 1.713M17×1.515.5015.67615.376No.10-24(4.826) 3.90 3.962 3.6831/4" -20G7 5.86 5.73M23×0419019791867M17×1016001615315917N 1224(5486)450459743445/16"18738723公制细螺纹

规格

标准径

2级牙钻孔径螺 丝 攻 牙 钻 孔 径 对 照 表

公制粗螺纹

美制迫牙丝攻钻孔径

美制粗螺纹

规 格(UNC)

标准径

2级牙钻孔径2级牙钻孔径规格

标准径

M2.3×0.4 1.90 1.979 1.867M17×1.016.0016.15315.917No.12-24(5.486) 4.50 4.597 4.3445/16" -18G77.387.23M2.5×0.45 2.10 2.138 2.013M18×2.016.0016.21015.8351/4 -20 5.10 5.257 4.9793/8" -16G78.898.72M2.6×0.45 2.20 2.238 2.113M18×1.516.5016.67616.3765/16 -18 6.60 6.731 6.4017/16" -14G810.4010.02M3.0×0.5 2.50 2.599 2.459M18×1.017.0017.15316.9173/8 -168.008.1537.7981/2" -13G811.9211.70M3.5×0.6 2.90 3.010 2.850M20×2.018.0018.21017.8357/16 -149.409.5509.1440 -80UNF G5 1.45 1.39M4.0×0.7 3.30 3.422 3.242M20×1.518.5018.67618.3761/2 -1310.9011.02310.592 1 -72G5 1.77 1.7M4.5×0.75 3.80 3.878 3.688M20×1.019.0019.15318.9179/16 -1212.2012.44611.989 2 -64G4 2.06 1.98M5.0×0.8 4.20 4.334 4.134M22×2.020.0020.21019.8355/8 -1113.6013.86813.386 3 -56G4 2.37 2.29M6.0×1.0 5.00 5.153 4.917M22×1.520.5020.67620.3763/4 -1016.6016.84016.307 4 -48G5 2.68 2.59M7.0×1.0 6.00 6.153 5.917M22×1.021.0021.15320.9177/8 -919.6019.76119.177 5 -44G5 2.99 2.9M8.0×1.25 6.80 6.912 6.647M24×2.022.0022.21021.835 1 -822.3022.60621.971 6 -40G5 3.29 3.19M9.0×1.257.807.9127.647M24×1.522.5022.67622.3761-1/8 -725.0025.34924.6388 -36G5 3.91 3.81M10×1.58.508.6768.376M24×1.023.0023.15322.9171-1/4 -728.2028.52427.81310 -32G6 4.53 4.44M11×1.59.509.6769.376M25×2.023.0023.21022.8351-3/8 -630.8031.11530.35312 -28G6 5.13 5.03M12×1.7510.3010.44110.106M25×1.523.5023.67623.3761-1/2 -634.0034.29033.5281/4" -28G7 6.00 5.91M14×2.012.0012.21011.835M25×1.024.0024.15323.9171-3/4 -539.5039.82738.9645/16" -24G77.537.42M16×2.014.0014.21013.835M26×1.524.5024.67624.376 2 -4-1/2

45.20

45.593

44.679

3/8" -24G79.108.99M18×2.515.5015.74415.294M27×2.025.0025.21024.8357/16" -20G810.6210.48M20×2.517.5017.74417.294M27×1.525.5025.67625.3761/2" -20

G812.20

12.06

M22×2519501974419294M27×1026002615325917美制细螺纹

M22×2.519.5019.74419.294M27×1.026.0026.15325.917M24×3.021.0021.25220.752M28×2.026.0026.21025.835最大

最小

M27×3.024.0024.25223.752M28×1.526.5026.67626.376(螺丝牙外径)

M30×3.5

26.50

26.771

26.211

M28×1.027.0027.15326.917No.0-80(1.524)

1.25 1.305 1.182M30×3.027.0027.25226.752No.1-72(1.854) 1.55 1.612 1.474用绞刀不用绞刀时

M30×2.028.0028.21027.835No.2-64(2.184) 1.85 1.912 1.7561/16 -27 5.9 6.15 6.35M30×1.528.5028.67628.376No.3-56(2.515) 2.10 2.197 2.0251/8 -278.38.438.74最大最小

M30×1.029.0029.15328.917No.4-48(2.845) 2.40 2.458 2.2711/4 -181111.1311.13M1.0×0.20.800.8210.783M32×2.030.0030.21029.835No.5-44(3.175) 2.70 2.740 2.5513/8 -181414.2714.68M1.1×0.20.900.9210.883M32×1.530.5030.67630.376No.6-40(3.505) 2.90 3.022 2.8201/2 -141717.8618.26M1.2×0.2 1.00 1.0210.983M33×3.030.0030.25229.752No.8-36(4.166) 3.50 3.606 3.4043/4 -142323.0123.42M1.4×0.2 1.20 1.221 1.183M33×2.031.0031.21030.835No.10-32(4.826) 4.10 4.165 3.963 1 -11-12928.9829.36M1.6×0.2 1.40 1.421 1.383M33×1.531.5031.67631.376No.12-28(5.486) 4.60 4.724 4.4961-1/4 -11-13737.6938.1M1.7×0.2 1.45 1.500 1.460M35×1.533.5033.67633.3761/4 -28 5.50 5.588 5.3601-1/2 -11-14343.6644.45M1.8×0.2 1.60 1.621 1.583M36×3.033.0033.25232.7525/16 -24 6.907.035 6.782 2 -11-1

55

55.58

56.36

M2.0×0.25 1.75 1.785 1.729M36×2.034.0034.21033.8353/8 -248.508.6368.382M2.2×0.25 1.95 1.985 1.929M36×1.5

34.50

34.676

34.376

7/16 -209.9010.0339.729M2.3×0.25 2.05 2.061 2.0011/2 -2011.5011.60711.329美制管螺纹

规格钻孔径NPT

NPS 公制细螺纹

规格

标准径

2级牙钻孔径规 格(UNF)

标准径

2级牙钻孔径

M2.5×0.35 2.20 2.221 2.1219/16 -1812.9013.08112.751M2.6×0.35 2.20 2.246 2.186规格精度最大最小5/8 -1814.5014.68114.351M3.0×0.35 2.70 2.721 2.621M1.0×0.25G40.920.893/4 -1617.5017.67817.323M3.5×0.35 3.20 3.221 3.121M1.2×0.25G4 1.11 1.097/8 -1420.5020.67520.270M4.0×0.5 3.50 3.599 3.459M1.4×0.30G4 1.30 1.26 1 -1223.3023.57123.114M4.5×0.5 4.00 4.099 3.959M1.6×0.35G4 1.47 1.431-1/8 -1226.5026.74626.289M5.0×0.5 4.50 4.599 4.459M1.7×0.35G4 1.57 1.521-1/4 -1229.6029.92129.464M5.5×0.5 5.00 5.099 4.959M1.8×0.35G4 1.67 1.621-3/8 -1232.8033.09632.639M6.0×0.75 5.30 5.378 5.188M2.0×0.40G4 1.84 1.791-1/2 -12

36.00

36.271

35.814

M6.0×0.5 5.50 5.550 5.400M2.2×0.45G5 2.04 1.98M7.0×0.75 6.30 6.378 6.188M2.3×0.40G4 2.14 2.09M7.0×0.5 6.50 6.550 6.400M2.5×0.45G5 2.34 2.27M8.0×1.07.007.153 6.917M2.6×0.45G5 2.44 2.37最大最小

M8.0×0.757.307.3787.188M3.0×0.50G5 2.82 2.75No.12 -32 4.70 4.826 4.623M8.0×0.57.507.5207.400M3.5×0.60G5 3.27 3.191/4 -32 5.60 5.689 5.487M9.0×1.08.008.1537.917M4.0×0.70G6 3.72 3.655/16 -327.107.2647.087M9.0×0.758.308.3788.188M5.0×0.80G6 4.67 4.593/8 -328.708.8648.662M10×1.258.808.9128.647M6.0×1.0G7 5.59 5.497/16 -2810.2010.33710.1351/2-28公制迫牙丝攻钻孔径

美制特细螺纹

规 格(UNEF)

标准径

2级牙钻孔径M10×1.09.009.1538.917M7.0×1.0G7 6.59 6.481/2 2811.8011.93811.710M10×0.759.309.3789.188M8.0×1.25G77.497.369/16 -2413.2013.38513.132M10×0.59.509.5209.400M10×1.50G79.349.225/8 -2414.8014.96814.732M11×1.010.0010.1539.917M10×1.25G79.499.353/4 -2017.8017.95717.679M11×0.7510.3010.37810.188M17×1.75G811.2311.097/8 -2021.0021.13220.854M12×1.510.5010.67610.376M17×1.25

G9

11.50

11.36

1 -20

24.10

24.307

24.029

M12×1.25

10.80

10.912

10.647

规格标准径最大最小规格

SM1/16-80 1.25 1.281 1.211硬材软材SM5/64-64 1.55 1.593 1.513W1/8 -40 2.65 2.601/16 -28 6.5 6.632 6.490SM3/32-56 1.9 1.936 1.841W5/32 -32 3.25 3.201/8 -288.58.6378.495SM3/32-100 2.1 2.156 2.081W3/16 -24 3.75 3.701/4 -1911.411.54911.341SM1/8-32 2.3(2.393)(2.233)W1/4 -20 5.10 5.003/8 -1914.915.05414.846SM1/8-40 2.5 2.551 2.421W5/16 -18 6.60 6.501/2 -1418.618.77318.489SM1/8-44 2.5 2.605 2.485W3/8 -168.007.903/4 -1424.024.25923.975SM1/8-48 2.6 2.657 2.547W7/16 -149.409.30 1 -1130.230.47230.110SM9/64-32 2.7(2.790)(2.630)W1/2 -1210.7010.50 1 1/4 -1138.839.13338.771SM9/64-40 2.9 2.948 2.818W9/16 -1212.3012.00 1 1/2 -1144.745.02644.664SM11/64-32 3.5 3.584 3.424W5/8 -1113.7013.50 2 -11

56.5

56.83756.475SM11/64-40 3.7 3.742 3.612W3/4 -1016.7016.50SM3/16-24 3.6 3.658 3.498W7/8 -919.5019.30SM3/16283838443684W1822402200英制管螺纹

针车用螺纹

英制螺纹钻孔径PS 规格 (新

规格Rp)标准径最大最小RF规格 (新规格SM3/16-28 3.8 3.844 3.684W1 -822.4022.00SM3/16-32 3.9 3.980 3.820W1-1/8 -725.0024.801/16 -28 6.7 6.843 6.561SM3/16-40 4.05 4.138 4.008W1-1/4 -728.3028.001/8 -288.78.8438.566SM7/32-32 4.7 4.774 4.6141/4 -1911.711.89011.445SM15/64-28 5.0 5.055 4.8753/8 -1915.215.39514.950SM1/4-24 5.2 5.266 5.086规格钻孔径1/2 -1419.019.17218.631SM1/4-28 5.4 5.452 5.2722BA 4.0-4.25/8 -1421.021.12820.587SM1/4-40 5.6 5.726 5.5963BA 3.4-3.63/4 -1424.524.65824.117SM9/32-20 5.7 5.824 5.6344BA 3.0-3.27/8 -1428.228.41827.877SM9/32-28 6.2 6.256 6.0665BA 2.7-2.8 1 -1130.630.93130.291SM5/16-18 6.3 6.444 6.2546BA

2.4-2.5

1 1/8 -1135.235.57934.939SM5/16-24 6.8 6.864 6.674 1 1/4 -1139.239.59238.952SM5/16-28 6.97.050 6.866 1 1/

2 -1145.045.48544.845SM11/32-287.77.8437.65

3 1 3/

4 -1151.051.42850.788SM3/8-187.98.0537.843 2 -1157.0

57.296

56.656

SM3/8-288.58.6378.447SM7/16-169.39.4409.220SM7/16-2810.110.22410.340SM1/2-1210.310.42010.180使用绞刀时不用绞刀时SM1/2-201/16 -28标准长度(最小)中之母螺牙内径

标准径

RT规格(新规格Rc)有效牙部之长度(最小)中之母螺牙内径

6.384G)标准径

最大最小英制电器螺纹

SM1/22011.311.41011.1901/16 28 6.1 6.2SM1/2-2811.711.81211.6221/8 -288.18.2SM9/16-20

12.9

13.018

12.778

1/4 -1910.711.03/8 -1914.214.51/2 -1417.618.03/4 -1423.023.51 -1129.029.51 1/4 -1137.538.01 1/2 -1143.444.02 -11

54.955.555.844

8.24910.96214.44817.97923.37829.45937.97643.86955.4126.2448.38811.17414.65818.26323.66329.82238.33944.232