螺丝攻牙钻孔径和滚丝径对照表
螺丝攻牙钻孔径和滚造径对照表
針車用螺紋 規 格 滾造徑
SM 1/8 SM 1/8 SM 9/64 SM 11/64 SM 3/16 SM 3/16 SM 7/32 SM 15/64 SM 1/4 SM 1/4 SM 9/32 SM 11/32 SM 3/8 SM 7/16 SM 7/16 SM 1/2 -40 -44 -40 -40 -32 -28 -32 -28 -40 -28 -28 -28 -28 -28 -16 -20 2.735-2.688 2.769-2.722 3.128-3.083 3.855-3.805 4.205-4.155 4.143-4.093 5.003-4.955 5.325-5.570 5.890-5.735 2.721-5.366 6.508-6.648 8.092-8.432 8.880-8.015 10.466-10.401 10.037-9.967 11.819-11.749
英 制 細 螺 紋 滾造徑 規格(UNF)
NO.5 NO.6 NO.8 NO.10 NO.12 1/4 5/16 3/8 7/16 1/2 -40 2.73 - 2.70 -32 3.05 - 3.02 -32 3.66 - 3.63 -24 4.26 - 4.22 -24 4.84 - 4.80 -20 5.72 - 5.68 -18 7.20 - 7.16 -16 8.79 - 8.74 -14 10.23 - 10.18 -13 11.82 - 11.76
超全螺纹攻牙钻孔直径和滚造直径对照表
M27×3.0
24.00
24.252
23.752
M30×3.5
26.50
26.771
26.211
公 制 细 螺 纹
规格
标准径
2级牙钻孔径
最大
最小
M1.0×0.2
0.80
0.821
0.783
M1.1×0.2
0.90
0.921
0.883
M1.2×0.2
1.00
1.021
0.983
M1.4×0.2
M24×1.0
23.00
23.153
22.917
M25×2.0
23.00
23.210
22.835
M25×1.5
23.50
23.676
23.376
M25×1.0
24.00
24.153
23.917
M26×1.5
24.50
24.676
24.376
M27×2.0
25.00
25.210
24.835
M27×1.5
M5.0×0.8
4.56
4.60
4.64
M6.0×1.0
5.45
5.50
5.55
M7.0×1.0
6.45
6.50
6.55
M8.0×1.25
7.31
7.38
7.44
M10×1.5
9.18
9.25
9.32
M10×1.25
9.31
9.38
9.44
M12×1.75
11.04
11.12
11.21
M12×1.25
NO.0-80(1.524)
螺丝攻牙钻孔径和滚造径对照表
精 度 等级
G4-G6 G7-G8 G9
0.86
0.88 -
0.96
0.98 -
1.06
1.08 -
1.24
1.25 -
1.41
1.43 -
1.51
1.53 -
1.61
1.63 -
1.78
1.80 -
1.95
1.98 -
2.08
2.10 -
2.25
2.28 -
2.35
2.38 -
2.73
2.75 -
螺丝攻牙钻孔径和滚造径对照表
公制粗螺纹
规格
M1.0*0.25 M1.1*0.25 M1.2*0.25 M1.4*0.30 M1.6*0.35 M1.7*0.35 M1.8*0.35 M2.0*0.40 M2.2*0.45 M2.3*0.40 M2.5*0.45 M2.6*0.45 M3.0*0.50 M3.0*0.60 M3.5*0.60 M4.0*0.70 M4.0*0.75 M4.5*0.75 M5.0*0.80 M5.0*0.90 M6.0*1.00 M7.0*1.00 M8.0*1.25 M9.0*1.25 M10*1.50 M11*1.50 M12*1.75 M14*2.00 M16*2.00 M18*2.50 M20*2.50 M22*2.50 M24*3.00 M27*3.00 M30*3.50
2.440 2.280
3.010 2.850
3.422 3.242
3.326 3.106
3.878 3.688
4.334 4.134
4.170 3.930
5.153 4.917
6.153 5.917
6.912 6.647
螺丝攻牙钻孔径和滚造径对照表
精度等级 G4－G6 G7－G8 G9
0.86 0.88 0.96 0.98 1.06 1.08 1.24 1.25 1.41 1.43 1.51 1.53 1.61 1.63 1.78 1.80 1.95 1.98 2.08 2.10 2.25 2.28 2.35 2.38 2.73 2.75 3.17 3.20 3.62 3.65 3.69 4.56 4.60 4.64 5.45 5.50 5.55 6.45 6.50 6.55 7.31 7.38 7.44 9.18 9.25 9.32 9.31 9.38 9.44 11.04 11.12 11.21 11.31 11.38 11.44
公制粗螺纹
公制细螺纹
无沟丝攻钻孔径
英制螺纹
美制粗螺纹
规格
标准径
2级牙钻孔径 最大 最小
规格
标准径
M1.0×0.25 M1.1×0.25 M1.2×0.25 M1.4×0.30 M1.6×0.35 M1.7×0.35 M1.8×0.35 M2.0×0.40 M2.2×0.45 M2.3×0.40
0.75 0.85 0.95 1.10 1.25 1.35 1.45 1.60 1.75 1.90
0.785 0.885 0.985 1.142 1.321 1.421 1.521 1.679 1.838 1.979
0.729 0.829 0.929 1.075 1.221 1.321 1.421 1.567 1.713 1.867
M12×1.00 M12×0.50 M14×1.50 M14×1.00 M15×1.50 M15×1.00 M16×1.50 M16×1.00 M17×1.50 M17×1.00
28.210 27.835
公司使用螺丝攻牙孔径对照表
M1.0*0.25 0.86 0.88 M1.1*0.25 0.96 0.98 M1.2*0.25 1.06 1.08 M1.4*0.30 1.24 1.25 M1.6*0.35 1.41 1.43 M1.7*0.35 1.51 1.53 M1.8*0.35 1.61 1.63 M2.0*0.40 1.78 1.80 M2.2*0.45 1.95 1.98 M2.3*0.40 2.08 2.10 M2.5*0.45 2.25 2.28 M2.6*0.45 2.35 2.38 M3.0*0.50 2.73 2.75 M3.5*0.60 3.17 3.20 M4.0*0.70 3.62 3.65 3.69 M5.0*0.80 4.56 4.60 4.64 M6.0*1.00 5.45 5.50 5.55 M7.0*1.00 6.45 6.50 6.55 M8.0*1.25 7.31 7.38 7.44 M10*1.50 9.18 9.25 9.32 M10*1.25 9.31 9.38 9.44 M12*1.75 11.04 11.12 11.21 M12*1.25 11.31 11.38 11.44 注:迫牙丝攻之钻孔径,在上表所列之数值,由 于被加工材料之材质,硬度,形状,尺寸等之影 响,多少会有所变动,因此于参考上表之同时, 亦精增减若干。
No 1-64(1.854) No 2-56(2.184) No 3-48(2.515) No 4-40(2.845) No 5-40(3.175) No 6-32(3.505) No 8-32(4.166) No 10-24(4.826) No 12-24(5.486) 2001-4-20 5/16 - 18 3/8 - 16 7/16 - 14 1/2 - 13 9/16 - 12 5/8 - 11 3/4 - 10 7/8 - 9 1 - 8 1-1/8 - 7 1-1/4 - 7 1-3/8 - 6 1-1/2 - 6 1-3/4 - 5 2 - 4-1/2
常用公英美制螺纹孔径和滚造径对照表
标准径
15.50 16.00 16.00 16.50 17.00 18.00 18.50 19.00 20.00 20.50 21.00 22.00 22.50 23.00 23.00 23.50 24.00 24.50 25.00 25.50 26.00 26.00 26.50 27.00 27.00 28.00 28.50 29.00 30.00 30.50 30.00 31.00 31.50 33.00 34.00 34.50 33.50
2 级牙钻孔径 最大 最小 0.821 0.783 0.921 0.883 1.021 0.983 1.221 1.183 1.421 1.383 1.500 1.460 1.621 1.583 1.785 1.729 1.985 1.929 2.061 2.001 2.221 2.121 2.246 2.186 2.721 2.621 3.221 3.121 3.599 3.459 4.099 3.959 4.599 4.459 5.099 4.959 5.378 5.188 5.550 5.400 6.378 6.188 6.550 6.400 7.153 6.917 7.378 7.188 7.520 7.400 8.153 7.917 8.378 8.188 8.912 8.647 9.153 8.917 9.378 9.188 9.520 9.400 10.153 9.917 10.378 10.188 10.676 10.376 11.153 10.917 11.520 11.400 12.676 12.376 13.153 12.917 13.676 13.376 14.153 13.917 14.676 14.376 15.153 14.917
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螺丝攻牙径对照表
SM 1/2 -20
11.819 -
SM 9/16 -20
13.400 -
公 制 螺 纹
规格
滚造径
M3.0*0.5
2.63 - 2.60
M3.0*0.6
2.56 - 2.53
M3.5*0.6
3.06 - 3.03
M4.0*0.7
3.49 - 3.45
M4.5*0.75
3.96 - 3.92
M5.0*0.8
5.099
4.959 M25*2.0
5.378
5.188 M25*1.5
5.55
5.4
M25*1.0
6.378
6.188 M26*1.5
6.55
6.4
M27*2.0
7.153
6.917 M27*1.5
7.378
7.188 M27*1.0
7.52
7.4
M28*2.0
8.153
7.917 M28*1.5
规格
M1.0*0.25 M1.1*0.25 M1.2*0.25 M1.4*0.3 M1.6*0.35 M1.7*0.35 M1.8*0.35 M2.0*0.4 M2.2*0.45 M2.3*0.4 M2.5*0.45 M2.6*0.45 M3.0*0.5 M3.5*0.6 M4.0*0.7 M4.5*0.75
SM 1/4 -40 5.890 - 5.735
SM 1/4 -28 5.721 - 5.366
SM 9/32 -28 6.508 - 6.648
SM11/32 -28 8.092 - 8.432
SM 3/8 -28 8.880 - 8.015SM 7/ຫໍສະໝຸດ 6 -2810.466 -
螺丝攻牙钻孔径和滚造径对照表
最大最小最大最小M1.0×0.250.750.7850.729NO.1-64(1.854) 1.55 1.582 1.425M1.1×0.250.850.8850.829NO.2-56(2.184) 1.80 1.871 1.695M1.2×0.250.950.9850.985NO.3-48(2.515) 2.10 2.146 1.941M1.4×0.3 1.10 1.142 1.075NO.4-40(2.845) 2.30 2.385 2.157M1.6×0.35 1.25 1.321 1.221NO.5-40(3.175) 2.60 2.697 2.487M1.7×0.35 1.35 1.421 1.321NO.6-32(3.505) 2.80 2.895 2.642M1.8×0.35 1.45 1.521 1.421NO8-32(4.166) 3.40 3.53 3.302M2.0×0.4 1.60 1.679 1.567NO.10-24(4.826) 3.90 3.962 3.683M2.2×0.45 1.75 1.838 1.713NO.12-24(5.486) 4.50 4.597 4.344M2.3×0.4 1.90 1.979 1.8671/4-20 5.10 5.257 4.979M2.5×0.45 2.10 2.138 2.0135/16-18 6.60 6.731 6.401M2.6×0.45 2.20 2.238 2.1133/8-168.008.1537.798M3.0×0.5 2.50 2.599 2.4597/16-149.409.559.144M3.0×0.6 2.40 2.440 2.2801/2-1310.8011.02310.592M3.5×0.6 2.90 3.010 2.8509/16-1212.2012.44611.989M4.0×0.7 3.30 3.422 3.2425/8-1113.6012.86813.386M4.0×0.75 3.25 3.326 3.1063/4-1016.5018.84016.307M4.5×0.75 3.80 3.878 3.6887/8-919.5019.76119.177M5.0×0.8 4.20 4.334 4.134122.2022.60621.971M5.0×0.9 4.10 4.170 3.9301-1/8-725.0025.34924.638M6.0×1.0 5.00 5.153 4.9171-1/4-728.2028.52427.813M7.0×1.0 6.00 6.153 5.9171-3/8-630.8031.11530.353M8.0×1.25 6.80 6.912 6.6471-1/2-634.0034.29033.528M9.0×1.257.807.9127.6471-3/4-539.5039.82738.964M10×1.58.508.6768.3762-4-1/245.2045.59344.679M11×1.59.509.6769.376M12×1.7510.3010.44110.106M14×2.012.0012.21011.835M16×2.014.0014.21013.835M18×2.515.5015.74415.294M20×2.517.5017.74417.294M22×2.519.5019.74419.294M24×3.021.0021.25220.752M27×3.024.0024.25223.752M30×3.526.5026.77126.211螺丝攻牙钻孔径和滚造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M1.0×0.20.800.8210.783NO.0-80(1.524) 1.25 1.305 1.182M1.1×0.20.900.9210.883NO.1-72(1.854) 1.55 1.612 1.474M1.2×0.2 1.00 1.0210.983NO.2-64(2.184) 1.85 1.912 1.756M1.4×0.2 1.20 1.221 1.183NO.3-56(2.515) 2.10 2.197 2.025M1.6×0.2 1.40 1.421 1.383NO.4-48(2.845) 2.40 2.458 2.271M1.7×0.2 1.45 1.500 1.460NO.5-44(3.175) 2.70 2.740 2.551M1.8×0.2 1.60 1.621 1.583NO.6-40(3.505) 2.90 3.022 2.820M2.0×0.25 1.75 1.785 1.729NO.8-36(4.166) 3.50 3.606 3.404M2.2×0.25 1.95 1.985 1.929NO.10-32(4.826) 4.10 4.165 3.963M2.3×0.25 2.05 2.061 2.001NO.12-28(5.846)4.60 4.724 4.496M2.5×0.35 2.20 2.221 2.1211/4-285.50 5.588 5.360M2.6×0.35 2.20 2.246 2.1865/16-246.907.035 6.782M3.0×0.35 2.70 2.721 2.6213/8-248.508.6368.382M3.5×0.35 3.20 3.221 3.1217/16-209.9010.0339.729M4.0×0.5 3.50 3.599 3.4591/2-2011.5011.60711.329M4.5×0.5 4.00 4.099 3.9599/16-1812.9013.08112.751M5.0×0.5 4.50 4.599 4.4595/8-1814.5014.68114.351M5.5×0.5 5.00 5.099 4.9593/4-1617.5017.67817.323M6.0×0.75 5.30 5.378 5.1887/8-1420.5020.67520.270M6.0×0.5 5.50 5.550 5.4001-1223.2023.57123.114M7.0×0.75 6.30 6.378 6.1881-1/8-1226.5026.74626.289M7.0×0.56.506.5506.4001-1/4-1229.5029.92129.464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M8.0×1.07.007.153 6.9171-3/8-1232.8033.09632.639M8.0×0.757.307.3787.1881-1/2-1236.0036.27135.814M8.0×0.57.507.5207.400M9.0×1.08.008.1537.917M9.0×0.758.308.3788.188M10×1.258.808.9128.647M10×1.09.009.1538.917M10×0.759.309.3789.188M10×0.59.509.5209.400M11×1.010.0010.1539.917M11×0.7510.3010.37810.188M12×1.510.5010.67610.376M12×1.2510.8010.91210.647M12×1.011.0011.15310.917M12×0.511.5011.52011.400M14×1.512.5012.67612.376M14×1.013.0013.15312.917M15×1.513.5013.67613.376M15×1.014.0014.15313.917M16×1.514.5014.67614.376M16×1.015.0015.15314.917M17×1.515.5015.67615.376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M17×1.016.0016.15315.917M18×2.016.0016.21015.835M18×1.516.5016.67616.376M18×1.017.0017.15316.917M20×2.018.0018.21017.835M20×1.518.5018.67618.376M20×1.019.0019.15318.917M22×2.020.0020.21019.835M22×1.520.5020.67620.376M22×1.021.0021.15320.917M24×2.022.0022.21021.835M24×1.522.5022.67622.376M24×1.023.0023.15322.917M25×2.023.0023.21022.835M25×1.523.5023.67623.376M25×1.024.0024.15323.917M26×1.524.5024.67624.376M27×2.025.0025.21024.835M27×1.525.5025.67625.376M27×1.026.0026.15325.917M28×2.026.0026.21025.835M28×1.526.5026.67626.376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M28×1.027.0027.15326.917M30×3.027.0027.25226.752M30×2.028.0028.21027.835M30×1.528.5028.67628.376M30×1.029.0029.15328.917M32×2.030.0030.21029.835M32×1.530.5030.67630.376M33×3.030.0030.25229.752M33×2.031.0031.21030.835M33×1.531.5031.67631.376M35×1.533.5033.67633.376M36×3.033.0033.25232.752M36×2.034.0034.21033.835M36×1.534.5034.67634.376规格标准径2级牙钻孔径规格（UNC）标准径2级牙钻孔径G4-G6G7-G8G9G4-G6G7-G8G9M1.0×0.250.860.88－NO.2-56UNC 1.94－－M1.1×0.250.960.98－NO.3-48 2.23－－M1.2×0.25 1.06 1.08－NO.4-40 2.50－－M1.4×0.3 1.24 1.25－NO.5-40 2.83－－M1.6×0.35 1.41 1.43－NO.6-32 3.07－－M1.7×0.35 1.51 1.53－NO.8-32 3.73 3.77－M1.8×0.35 1.61 1.63－NO.10-24 4.24 4.3－M2.0×0.4 1.78 1.80－NO.12-24 4.90 4.96－M2.2×0.45 1.95 1.98－1/4-20－ 5.72－M2.3×0.4 2.08 2.10－5/16-18－7.24－M2.5×0.45 2.25 2.28－3/8-16－8.748.81M2.6×0.45 2.35 2.38－7/16-14－10.2010.30M3.0×0.5 2.73 2.75－1/2-13－11.2711.82M3.5×0.6 3.17 3.20－NO.2-64UNF 1.97－－M4.0×0.7 3.62 3.65 3.69NO.3-56 2.27－－M5.0×0.8 4.56 4.60 4.64NO.4-48 2.56－－M6.0×1.0 5.45 5.50 5.55NO.5-44 2.86－－M7.0×1.0 6.45 6.50 6.55NO.6-40 3.16－－M8.0×1.257.317.387.44NO.8-36 3.78－－M10×1.59.189.259.32NO.10-32 4.39 4.43－M10×1.259.319.389.44NO.12-28 4.99 5.04－M12×1.7511.0411.1211.211/4-28 5.85 5.90－M12×1.2511.3111.3811.445/16-247.367.41－3/8-24－9.00－7/16-20－10.4810.541/2-20－12.0712.13螺丝攻牙钻孔径和滚造径对照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最大最小NO.12-32 4.70 4.826 4.6232BA 4.0-41/4 -32 5.60 5.690 5.4863BA 5/16 -327.107.2647.0874BA 3.0-33/8 -328.708.8658.6615BA 2.7-27/16 -2810.2010.33810.1356BA2.4-21/2 -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美制特细螺纹英制电器螺纹规格钻孔规格(UNEF)标准径2级牙钻孔径使用绞刀时不用绞刀时PS 1/16 - 28 6.50 6.632 6.490PT 1/16 - 28 6.10 6.20 6.244 6.3841/16 - 27 6.10 6.25 6.35PS 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 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- 1129.0029.5029.45929.822 1 - 11-1/228.5828.9829.36PS 1-1/4 - 1138.8039.13238.772PT 1-1/4 - 1137.5038.0037.97638.3391-1/4-11-1/237.3137.6938.10PS 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钻孔径最大最小使用纹刀时不用纹刀时NPTNPS 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规格标准径钻孔径规格螺丝攻牙钻孔径和滚造径对照表英制管螺纹英制管螺纹美制管螺纹硬材软材W 1/8 - 40 2.65 2.60M3×0.5 2.63-2.60SM1/8-40 2.735-2.688W 5/32 - 32 3.25 3.20M3.0×0.6 2.56-2.53SM1/8-44 2.769-2.722W 3/16 - 24 3.75 3.70M3.5×0.6 3.06-3.03SM9/64-40 3.128-3.083W 1/4 - 20 5.10 5.00M4.0×0.7 3.49-3.45SM11/64-40 3.855-3.805W 5/16 - 18 6.60 6.50M4.0×0.75 3.45-3.41SM3/16-32 4.205-4.155W 3/8 - 168.007.90M4.5×0.75 3.96-3.92SM3/16-28 4.143-4.093W 7/16 - 149.409.30M5.0×0.8 4.43-4.38SM7/32-32 5.003-4.955W 1/2 - 1210.7010.50M5.0×0.9 4.36-4.31SM15/64-28 5.325-5.570W 9/16 - 1212.3012.00M6.0×1.0 5.30-5.25SM1/4-40 5.890-5.735W 5/8 - 1113.7013.50M7.0×1.0 6.30-6.25SM1/4-28 5.721-5.366W 3/4 - 1016.7016.50M8.0×1.07.28-7.23SM9/32-28 6.508-6.648W 7/8 - 919.5019.30M8.0×1.257.12-7.07SM11/32-288.092-8.432W1 - 822.4022.00SM3/8-288.880-8.015W 1-1/8 - 725.0024.80SM7/16-2810.466-10.401W 1 - 1/4 - 728.3028.00SM7/16-1610.037-9.967SM1/2-2011.819-11.749SM9/26-2013.400-13.425规格滚造径规格(UNEF)钻孔径规格滚造径螺丝攻牙钻孔径和滚造径对照表英制螺纹公制螺纹针车用螺纹。
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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
×
×
×
×
×
×
×
NO8-32
×
×
×
1/4-20
×
5/16-18
×
3/8-16
×
7/16-14
×
1/2-13
×
9/16-12
×
5/8-11
×
3/4-10
×
7/8-9
×
1
×
1-1/8-7
×
G7-G8
G9
×
－
－
－
×
－
－
－
×
－
－
－
×
－
－
－
×
－
－
－
×
－
－
×
－
－
×
－
－
×
－
1/4-20
－
－
×
－
5/16-18
－
－
×
－
3/8-16
－
×
－
7/16-14
－
×
－
1/2-13
－
×
－
－
－
×
－
－
×
－
－
×
－
－
×
－
－
×
－
－
M10×
－
M10×
－
M12×
1/4-28
－
M12×
5/16-24
－
3/8-24
－
－
7/16-20
1-1/4-7
×
1-3/8-6
×
1-1/2-6
×
1-3/4-5
M10×
2-4-1/2
M11×
M12×
M14×
M16×
M18×
M20×
M22×
M24×
M27×
M30×
签名档：
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
×
×
×
×
×
3/4 - 14
PS 1 - 11
PT 1- 11
1 - 11-1/2
PS 1-1/4 - 11
PT 1-1/4 - 11
1-1/4-11-1/2
PS 1-1/2 - 11
PT 1-1/2 - 11
1-1/2-11-1/2
PS 2 - 11
PT 2 - 11
2 - 11 - 1/2
签名档：
英制螺纹螺母孔径
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
M11×
M11×
M12×
M12×
M12×
×
M14×
M14×
M15×
M15×
M16×
M16×
M17×
M17×
M18×
M18×
M18×
M20×
M20×
M20×
M22×
M22×
M22×
M24×
M24×
M24×
M25×
M25×
×
×
×
×
×
×
1/4-28
×
5/16-24
×
3/8-24
×
7/16-20
×
1/2-20
×
9/16-18
×
5/8-18
×
3/4-16
×
7/8-14
×
1-12
×
1-1/8-12
×
1-1/4-12
×
1-3/8-12
×
1-1/2-12
×
×
×
M10×
M10×
M10×
M10×
螺丝攻牙钻孔径和滚丝径对照表
公制细螺纹
M25×
M26×
M27×
M27×
M27×
M28×
M28×
M28×
M30×
M30×
M30×
M30×
M32×
M32×
M33×
M33×
M33×
M35×
M36×
M36×
M36×
签名档：
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-G6
G7-G8
G9
G4-G6
SM7/16-28
1 - 1/4 - 7
SM7/16-16
签名档：
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
PT 1/16 - 28
3/4
1
11/4
13/8
11/2
28
19
19
14
14
11
11
11
11
－
1/2-20
－
签名档：
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
2BA
-32
3BA
5/16 -32
4BA
-32
5BA
-28
6BA
-28
9/16 -24
5/8 -24
3/4 -20
7/8 -20
1 -20
签名档：
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 - 40
M3×
5/32 - 32
×
3/16 - 24
×
1/4 - 20
×
5/16 - 18
×
3/8 - 16
×
7/16 - 14
×
1/2 - 12
×
9/16 - 12
×
5/8 - 11
×
3/4 - 10
×
7/8 - 9
×
- 8
SM3/8-28
1-1/8 - 7
英制螺纹
圆拄管螺纹
螺纹直径
（英寸）
每英寸牙数
钻头直径（毫米）
螺纹直径（英寸）
每英寸牙数
钻头直径（毫米）
铸铁、黄铜、青铜
钢、可锻铸铁
3/16
1/4
5/16
3/8
1/2
5/8
3/4
7/8
1
11/8
11/4
11/2
13/4
2
24
20
18
16
12
11
10
9
8
7
7
6
5
41/2
8
25
34
1/8
1/4
3/8
1/2
1/16 - 27
PS 1/8 - 28
PT 1/8 - 28
1/8 - 27
PS 1/4 - 19
PT 1/4 - 19
1/4 - 18
PS 3/8 - 19
PT 3/8 - 19
3/8 - 18
PS 1/2 - 14
PT 1/2 - 14
1/2 - 14
PS 3/4 -14
PT 3/4 - 14