螺丝攻牙孔径对照表
螺丝攻牙对照表
標準徑
NO. 1 - 64 (1.854) NO. 2- 56 (2.134) 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)
4.20 4.334 4.134
M6.0×0.75
5.30
5.378 5.188
M5.0×0.9
4.10 4.170 3.930
M6.0×0.5
5.50
5.550 5.400
M6.0×1.0
5.00 5.153 4.917
M7.0×0.75
6.30
6.378 6.188
M7.0×1.0
6.00 6.153 5.917
--
標準徑
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 33.50 33.00 34.00 34.50
--
2級牙鑽孔徑
最大
最小
23.676 23.376
螺絲攻牙鑽孔徑和滾造徑對照表
公制粗螺紋
公制細螺紋
規格
標準徑
2級牙鑽孔徑
最大
最小
規格
標準徑
2級牙鑽孔徑
最大
最小
M1.0×0.25
0.75 0.785 0.729
M1.0×0.2
0.80
0.821 0.783
M1.1×0.25
螺丝攻牙孔径对照表
13.081 12.751
14.681 14.351
17.678 17.323
20.575 20.270
23.571 23.114
26.746 26.289
29.921 29.464
33.096 32.639
36.271 35.814
公制迫牙丝攻钻孔径
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 M3.5*0.60 M4.0*0.70 M5.0*0.80 M6.0*1.00 M7.0*1.00 M8.0*1.25 M10*1.50 M10*1.25 M12*1.75 M12*1.25
20.376 20.917 21.835 22.376 22.917 22.835 23.376 23.917
24.676 25.210 25.676 26.153 26.210 26.676 27.153 27.152 28.210 28.676 29.153 30.210
24.376 24.835 25.376 25.917 25.835 26.376 26.917 26.752 27.835 28.376 28.917 29.835
1.25 1.55 1.85 2.10 2.40 2.70 2.90 3.50 4.10 4.60 5.50 6.90 8.50 9.90 11.50 12.90 14.50 17.50 20.50 23.20 26.50 29.50 32.80 36.00
2级牙钻孔径
最大
螺丝攻牙孔径对照表
M12*1.0 M12*0.5 M14*1.5 M14*1.0 M15*1.5 M15*1.0 M16.1.5 M16*1.0 M17*1.5 M17*1.0 M18*2.0 M18*1.5 M18*1.0 M20*2.0 M20*1.5 M20*1.0 M22*2.0 M22*1.5 M22*1.0 M24*2.0 M24*1.5 M24*1.0 M25*2.0 M25*1.5 M25*1.0 M26*1.5 M27*2.0 M27*1.5 M27*1.0 M28*2.0 M28*1.5 M28*1.0 M30*3.0 M30*2.0 M30*1.5 M30*1.0 M32*2.0 M32*1.5 M33*1.0 M33*2.0 M33*1.5 M35*1.5 M36*3.0 M36*2.0 M36*1.5
10.917 11.400 12.376 12.917 13.376 13.917 14.376 14.917 15.376 15.917 15.835 16.976 16.917 17.835 18.376 18.917 19.835 20.376 20.917 21.835 22.376 22.917 22.835 23.376 23.917 24.376 24.835 25.376 25.917 25.835 26.376 26.917 26.752 27.835 28.376 28.917 29.835 30.376 29.752 30.835 31.376 33.376 32.752 33.835 34.376
1.25 1.55 1.85 2.10 2.40 2.70 2.90 3.50 4.10 4.60 5.50 6.90 8.50 9.90 11.50 12.90 14.50 17.50 20.50 23.20 26.50 29.50 32.80 36.00
螺纹孔径对照表1
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。
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，亦请增减若干。
螺纹攻牙钻孔径和滚造径对照表
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；而依据市售之标准钻头所选定的。
在使用钻头的情况下，由于钻头的形状及尺寸、精度、被钻孔之材质等，对于所钻孔的尺寸、精度有很大的影响，所以使用本表之钻孔径，若有不。
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
螺纹攻牙钻孔径对照表
2.05 2.061 2.001
2.20 2.221 2.121
2.20 2.246 2.186
2.70 2.721 2.621
3.20 3.221 3.121
3.50 3.599 3.459
4.00 4.099 3.959
4.50 4.599 4.459
5.00 5.099 4.959
M6.0×0.75 5.30 5.378 5.188
19.50 19.744 19.294
21.00 21.252 20.752
24.00 24.252 23.752
26.50 26.771 26.211
规格
M1.0×0.2 M1.1×0.2 M1.2×0.2 M1.4×0.2 M1.6×0.2 M1.7×0.2 M1.8×0.2 M2.0×0.25 M2.2×0.25 M2.3×0.25 M2.5×0.35 M2.6×0.35 M3.0×0.35 M3.5×0.35 M4.0×0.5 M4.5×0.5 M5.0×0.5 M5.5×0.5
-6
1-1/2
-6
1-3/4
-5
2
-4-1/2
美制粗螺纹
标准径
2级牙钻孔径 最大 最小
1.55 1.582 1.425
பைடு நூலகம்
1.80 1.871 1.695
2.10 2.146 1.941
2.30 2.385 2.157
2.60 2.697 2.487
2.80 2.895 2.642
3.40 3.530 3.302
No.12-28(5.486)
1/4
-28
5/16
-24
3/8
-24
螺丝攻牙孔径对照表
公制细螺纹
规格
M1.0*0.2 M1.1*0.2 M1.2*0.2 M1.4*0.2 M1.6*0.2 M1.7*0.2 M1.8*0.2 M2.0*0.25 M2.2*0.25 M2.3*0.25 M2.5*0.35 M2.6*0.35 M3.0*0.35 M3.5*0.35 M4.0*0.5 M4.5*0.5 M5.0*0.5 M5.5*0.5 M6.0*0.75 M6.0*0.5 M7.0*0.75 M7.0*0.5 M8.0*1.0 M8.0*0.75 M8.0*0.5 M9.0*1.0 M9.0*0.75 M10*1.25 M10*1.0 M10*0.75 M10*0.5 M11*1.0 M11*0.75 M12*1.50 M12*1.25
螺丝攻牙钻孔径和滚造径对照表
精度本有表很所 大的影
公制粗螺纹
公制细螺纹
公制迫牙丝攻钻孔径
规格
标准径
2级牙钻孔径
最大
最小
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
螺丝攻牙钻孔对照表
注：无槽沟死攻之钻孔经，在上表所列之 数值，由于被加工材料材质、硬度、形状 、尺寸等影响，多少会有秘变动，因此于 参考上表同时，亦请增减若干。
6.10 8.10 10.70 14.20 17.60 23.00 29.00 37.50 43.40 54.90
6.20 8.20 11.00 14.50 18.00 23.50 29.50 38.00 44.00 55.50
公 制 粗 螺 纹
规格
M1.0X0.25 M1.1X0.25 M1.2X0.25 M1.4X0.3 M1.6X0.35 M1.7X0.35 M1.8X0.35 M2.0X0.4 M2.2X0.45 M2.3X0.4 M2.5X0.45 M2.6X0.45 M3.0X0.5 M3.0X0.6 M3.5X0.6 M4.0X0.7 M4.0X0.75 M4.5X0.75 M5.0X0.8 M5.0X0.9 M6.0X1.0 M7.0X1.0 M8.0X1.25 M9.0X1.25 M10X1.5 M11X1.5 M12X1.75 M14X2.0 M16X2.0 M18X2.5 M20X2.5 M22X2.5 M24X3.0 M27X3.0 M30X3.5
6.244 8.249 10.962 14.448 17.979 23.379 29.459 37.976 43.869 55.412
6.364 8.388 11.174 14.658 18.263 23.663 29.822 38.339 44.232 55.844
美 制 粗 螺 纹
规格 （UNF）
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 2.221 2.121 3.599 2.459 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 10.912 10.647 11.153 10.917 11.520 11.400 12.676 12.376 13.153 12.917
螺丝攻牙钻孔径和滚丝径对照表
螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝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M1.0×0.25 0.75 0.785 0.729NO.1-64(1.854) 1.55 1.582 1.425M1.1×0.25 0.85 0.885 0.829NO.2-56(2.184) 1.80 1.871 1.695M1.2×0.25 0.95 0.985 0.985NO.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 1.867 1/4-20 5.10 5.257 4.979M2.5×0.45 2.10 2.138 2.013 5/16-18 6.60 6.731 6.401M2.6×0.45 2.20 2.238 2.113 3/8-16 8.00 8.153 7.798M3.0×0.5 2.50 2.599 2.459 7/16-14 9.40 9.55 9.144M3.0×0.6 2.40 2.440 2.280 1/2-13 10.80 11.023 10.592M3.5×0.6 2.90 3.010 2.850 9/16-12 12.20 12.446 11.989M4.0×0.7 3.30 3.422 3.242 5/8-11 13.60 12.868 13.386M4.0×0.75 3.25 3.326 3.106 3/4-10 16.50 18.840 16.307M4.5×0.75 3.80 3.878 3.688 7/8-9 19.50 19.761 19.177M5.0×0.8 4.20 4.334 4.134 1 22.2022.606 21.971M5.0×0.9 4.10 4.170 3.930 1-1/8-7 25.00 25.349 24.638M6.0×1.0 5.00 5.153 4.917 1-1/4-7 28.20 28.524 27.813M7.0×1.0 6.00 6.153 5.917 1-3/8-6 30.80 31.115 30.353M8.0×1.25 6.80 6.912 6.647 1-1/2-6 34.00 34.290 33.528M9.0×1.25 7.80 7.912 7.647 1-3/4-5 39.50 39.827 38.964M10×1.5 8.50 8.676 8.376 2-4-1/2 45.20 45.593 44.679M11×1.5 9.50 9.676 9.376M12×1.75 10.30 10.441 10.106M14×2.0 12.00 12.210 11.835M16×2.0 14.00 14.210 13.835M18×2.5 15.50 15.744 15.294M20×2.5 17.50 17.744 17.294M22×2.5 19.50 19.744 19.294M24×3.0 21.00 21.252 20.752M27×3.0 24.00 24.252 23.752M30×3.5 26.50 26.771 26.211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M1.0×0.2 0.80 0.821 0.783 NO.0-80(1.524) 1.25 1.305 1.182M1.1×0.2 0.90 0.921 0.883 NO.1-72(1.854) 1.55 1.612 1.474M1.2×0.2 1.00 1.021 0.983 NO.2-64(2.184) 1.85 1.912 1.756M1.4×0.2 1.20 1.221 1.183 NO.3-56(2.515) 2.10 2.197 2.025M1.6×0.2 1.40 1.421 1.383 NO.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 2.121 1/4-28 5.50 5.588 5.360M2.6×0.35 2.20 2.246 2.186 5/16-24 6.90 7.035 6.782M3.0×0.35 2.70 2.721 2.621 3/8-24 8.50 8.636 8.382M3.5×0.35 3.20 3.221 3.121 7/16-20 9.90 10.033 9.729M4.0×0.5 3.50 3.599 3.459 1/2-20 11.50 11.607 11.329M4.5×0.5 4.00 4.099 3.959 9/16-18 12.90 13.081 12.751M5.0×0.5 4.50 4.599 4.459 5/8-18 14.50 14.681 14.351M5.5×0.5 5.00 5.099 4.959 3/4-16 17.50 17.678 17.323M6.0×0.75 5.30 5.378 5.188 7/8-14 20.50 20.675 20.270M6.0×0.5 5.50 5.550 5.400 1-12 23.20 23.571 23.114M7.0×0.75 6.30 6.378 6.188 1-1/8-12 26.50 26.746 26.289M7.0×0.5 6.50 6.550 6.400 1-1/4-1229.50 29.921 29.464M8.0×1.0 7.00 7.153 6.917 1-3/8-12 32.80 33.096 32.639M8.0×0.75 7.30 7.378 7.188 1-1/2-12 36.00 36.271 35.814M8.0×0.5 7.50 7.520 7.400M9.0×1.0 8.00 8.153 7.917M9.0×0.75 8.30 8.378 8.188M10×1.25 8.80 8.912 8.647M10×1.0 9.00 9.153 8.917M10×0.75 9.30 9.378 9.188M10×0.5 9.50 9.520 9.400M11×1.0 10.00 10.153 9.917M11×0.75 10.30 10.378 10.188M12×1.5 10.50 10.676 10.376M12×1.25 10.80 10.912 10.647M12×0.5 11.50 11.520 11.400 M14×1.5 12.50 12.676 12.376 M14×1.0 13.00 13.153 12.917 M15×1.5 13.50 13.676 13.376 M15×1.0 14.00 14.153 13.917 M16×1.5 14.50 14.676 14.376 M16×1.0 15.00 15.153 14.917 M17×1.5 15.50 15.676 15.376 M17×1.0 16.00 16.153 15.917 M18×2.0 16.00 16.210 15.835 M18×1.5 16.50 16.676 16.376 M18×1.0 17.00 17.153 16.917 M20×2.0 18.00 18.210 17.835 M20×1.5 18.50 18.676 18.376 M20×1.0 19.00 19.153 18.917 M22×2.0 20.00 20.210 19.835 M22×1.5 20.50 20.676 20.376 M22×1.0 21.00 21.153 20.917M24×1.5 22.50 22.676 22.376 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 25.50 25.676 25.376 M27×1.0 26.00 26.153 25.917 M28×2.0 26.00 26.210 25.835 M28×1.5 26.50 26.676 26.376 M28×1.0 27.00 27.153 26.917 M30×3.0 27.00 27.252 26.752 M30×2.0 28.00 28.210 27.835 M30×1.5 28.50 28.676 28.376 M30×1.0 29.00 29.153 28.917 M32×2.0 30.00 30.210 29.835 M32×1.5 30.50 30.676 30.376M33×3.0 30.00 30.252 29.752M33×2.0 31.00 31.210 30.835M33×1.5 31.50 31.676 31.376M35×1.5 33.50 33.676 33.376M36×3.0 33.00 33.252 32.752M36×2.0 34.00 34.210 33.835M36×1.5 34.50 34.676 34.376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 G7-G8 G9M1.0×0.25 0.86 0.88 －NO.2-56UNC 1.94 －－M1.1×0.25 0.96 0.98 －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 －－－M1.8×0.35 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 －8.74 8.81 M2.6×0.45 2.35 2.38 －7/16-14 －10.20 10.30M3.0×0.5 2.73 2.75 －1/2-13 －11.27 11.82M3.5×0.6 3.17 3.20 －NO.2-64UNF 1.97－－M4.0×0.7 3.62 3.65 3.69 NO.3-56 2.27 －－M5.0×0.8 4.56 4.60 4.64 NO.4-48 2.56 －－－M7.0×1.0 6.45 6.50 6.55 NO.6-40 3.16 －－M8.0×1.25 7.31 7.38 7.44 NO.8-36 3.78 －－M10×1.5 9.18 9.25 9.32 NO.10-32 4.394.43 －M10×1.25 9.31 9.38 9.44 NO.12-28 4.99 5.04 －M12×1.75 11.04 11.12 11.21 1/4-28 5.85 5.90 －M12×1.25 11.31 11.38 11.44 5/16-24 7.36 7.41 －3/8-24 －9.00 －7/16-20 －10.48 10.541/2-20 －12.07 12.13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NO.12-32 4.70 4.826 4.623 2BA 4.0-4.2 1/4 -32 5.60 5.690 5.486 3BA5/16 -32 7.10 7.264 7.087 4BA 3.0-3.2 3/8 -32 8.70 8.865 8.661 5BA 2.7-2.8 7/16 -28 10.20 10.338 10.135 6BA 2.4-2.51/2 -28 11.80 11.938 11.7099/16 -24 13.20 13.386 13.1325/8 -24 14.80 14.986 14.7323/4 -20 17.80 17.958 17.6787/8 -20 21.00 21.133 20.8531 -20 24.00 24.308 24.028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 2.65 2.60 M3×0.5 2.63-2.60SM1/8-40 2.735-2.688W 5/32 - 32 3.25 3.20 M3.0×0.6 2.56-2.53 SM1/8-44 2.769-2.722W 3/16 - 24 3.75 3.70 M3.5×0.6 3.06-3.03 SM9/64-40 3.128-3.083W 1/4 - 20 5.10 5.00 M4.0×0.7 3.49-3.45 SM11/64-40 3.855-3.805W 5/16 - 18 6.60 6.50 M4.0×0.75 3.45-3.41 SM3/16-32 4.205-4.155W 3/8 - 16 8.00 7.90 M4.5×0.75 3.96-3.92 SM3/16-28 4.143-4.093W 7/16 - 14 9.40 9.30 M5.0×0.8 4.43-4.38 SM7/32-32 5.003-4.955W 1/2 - 12 10.70 10.50 M5.0×0.9 4.36-4.31 SM15/64-28 5.325-5.570W 9/16 - 12 12.30 12.00 M6.0×1.05.30-5.25 SM1/4-40 5.890-5.735W 5/8 - 11 13.70 13.50 M7.0×1.0 6.30-6.25 SM1/4-28 5.721-5.366W 3/4 - 10 16.70 16.50 M8.0×1.0 7.28-7.23 SM9/32-28 6.508-6.648W 7/8 - 9 19.50 19.30 M8.0×1.25 7.12-7.07 SM11/32-28 8.092-8.432W1 - 8 22.40 22.00 SM3/8-288.880-8.015W 1-1/8 - 7 25.00 24.80 SM7/16-28 10.466-10.401W 1 - 1/4 - 7 28.30 28.00 SM7/16-16 10.037-9.967SM1/2-20 11.819-11.749SM9/26-20 13.400-13.425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 6.50 6.632 6.490 PT 1/16 - 28 6.10 6.20 6.244 6.384 1/16 - 27 6.10 6.25 6.35PS 1/8 - 28 8.50 8.637 8.495 PT 1/8 - 28 8.10 8.20 8.249 8.388 1/8 - 27 8.33 8.43 8.74PS 1/4 - 19 11.40 11.549 11.341 PT 1/4 - 19 10.70 11.00 10.962 11.174 1/4 - 18 10.72 11.13 11.13PS 3/8 - 19 15.00 15.054 14.846 PT 3/8 - 19 14.20 14.50 14.448 14.658 3/8 - 18 14.27 14.27 14.68PS 1/2 - 14 18.50 18.773 18.489 PT 1/2 - 14 17.60 18.00 17.979 18.263 1/2 - 14 17.48 17.86 18.26PS 3/4 -14 24.00 24.259 23.975 PT 3/4 - 14 23.00 23.50 23.378 23.663 3/4 - 14 22.63 23.01 23.42PS 1 - 11 30.20 30.471 30.111 PT 1- 11 29.00 29.50 29.459 29.822 1 - 11-1/2 28.58 28.98 29.36PS 1-1/4 - 11 38.80 39.132 38.772 PT 1-1/4 - 11 37.50 38.00 37.976 38.3391-1/4-11-1/2 37.31 37.69 38.10PS 1-1/2 - 11 44.80 45.025 44.665 PT 1-1/2 - 11 43.40 44.00 43.869 44.2321-1/2-11-1/2 43.66 44.04 44.45PS 2 - 11 56.50 56.836 56.476 PT 2 - 11 54.90 55.50 55.412 55.844 2 - 11 - 1/2 55.58 55.96 56.36。
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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 M3.5*0.60 M4.0*0.70 M5.0*0.80 M6.0*1.00 M7.0*1.00 M8.0*1.25 M10*1.50 M10*1.25 M12*1.75 M12*1.25
11.153 11.520 12.676 13.153 13.676 14.153 14.676 15.153 15.676 16.153 16.210 16.676 17.153 18.210 18.676 19.153 20.210 20.676 21.153 22.210 22.676 23.153 23.210 23.676 24.153 24.676 25.210 25.676 26.153 26.210 26.676 27.153 27.152 28.210 28.676 29.153 30.210 30.676 30.252 31.210 31.676 33.676 33.252 34.210 34.676
3.69 4.64 5.55 6.55 7.44 9.32 9.44 11.21 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。
美制粗螺纹
规格(UNC) 规格 标准径 2级牙钻孔径 级牙钻孔径 最大 最小
M12*1.0 M12*0.5 M14*1.5 M14*1.0 M15*1.5 M15*1.0 M16.1.5 M16*1.0 M17*1.5 M17*1.0 M18*2.0 M18*1.5 M18*1.0 M20*2.0 M20*1.5 M20*1.0 M22*2.0 M22*1.5 M22*1.0 M24*2.0 M24*1.5 M24*1.0 M25*2.0 M25*1.5 M25*1.0 M26*1.5 M27*2.0 M27*1.5 M27*1.0 M28*2.0 M28*1.5 M28*1.0 M30*3.0 M30*2.0 M30*1.5 M30*1.0 M32*2.0 M32*1.5 M33*1.0 M33*2.0 M33*1.5 M35*1.5 M36*3.0 M36 2级牙钻孔径 级牙钻孔径 最大 最小
No 0-80(1.524) No 1-72(1.854) No 2-64(2.184) No 3-58(2.515) No 4-48(2.845) No 5-44(3.175) No 6-40(3.506) No 8-36(4.166) No 10-32(4.826) No 12-28(5.846) 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
0.729 0.829 0.929 1.075 1.221 1.321 1.421 1.567 1.713 1.867 2.013 2.113 2.459 2.280 2.850 3.242 3.106 3.688 4.134 3.930 4.917 5.917 6.647 7.647 8.376 9.376 10.160 11.835 13.835 15.294 17.294 19.294 20.752 23.752 26.211
0.75 0.85 0.95 1.00 1.25 1.35 1.45 1.60 1.75 1.90 2.10 2.20 2.50 2.40 2.90 3.30 3.25 3.80 4.20 4.10 5.00 6.00 6.80 7.80 8.50 9.50 10.30 12.00 14.00 15.50 17.50 19.50 21.00 24.00 26.50
11.00 11.50 12.50 13.00 13.50 14.00 14.50 15.00 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 33.50 33.00 34.00 34.50
螺丝攻牙钻孔径和滚造径对照表
公制粗螺纹
规格 标准径 2级牙钻孔径 级牙钻孔径 最大 最小 规格
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；而依抿市售之标准钻头所选定的，在使用钻头的情 精度有很大的影响，所以使用本表之钻孔径，若有不当之处，应视实际壮况适当的变更钻头直径，本表是依据2级牙
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) 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 - 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
10.917 11.400 12.376 12.917 13.376 13.917 14.376 14.917 15.376 15.917 15.835 16.976 16.917 17.835 18.376 18.917 19.835 20.376 20.917 21.835 22.376 22.917 22.835 23.376 23.917 24.376 24.835 25.376 25.917 25.835 26.376 26.917 26.752 27.835 28.376 28.917 29.835 30.376 29.752 30.835 31.376 33.376 32.752 33.835 34.376
0.821 0.921 1.021 1.221 1.421 1.500 1.621 1.785 1.985 2.610 2.221 2.246 2.721 3.221 3.599 4.099 4.599 5.099 5.378 5.550 6.378 6.550 7.153 7.378 7.520 8.153 8.378 8.912 9.153 9.378 9.520 10.153 10.378 10.676 10.912
公制细螺纹
规格 标准率 2级牙钻孔径 级牙钻孔径 最大 最小
M1.0*0.2 M1.1*0.2 M1.2*0.2 M1.4*0.2 M1.6*0.2 M1.7*0.2 M1.8*0.2 M2.0*0.25 M2.2*0.25 M2.3*0.25 M2.5*0.35 M2.6*0.35 M3.0*0.35 M3.5*0.35 M4.0*0.5 M4.5*0.5 M5.0*0.5 M5.5*0.5 M6.0*0.75 M6.0*0.5 M7.0*0.75 M7.0*0.5 M8.0*1.0 M8.0*0.75 M8.0*0.5 M9.0*1.0 M9.0*0.75 M10*1.25 M10*1.0 M10*0.75 M10*0.5 M11*1.0 M11*0.75 M12*1.50 M12*1.25
0.86 0.96 1.06 1.24 1.41 1.51 1.61 1.78 1.95 2.08 2.25 2.35 2.73 3.17 3.62 4.56 5.45 6.45 7.31 9.18 9.31 11.04 11.31
0.88 0.98 1.08 1.25 1.43 1.53 1.63 1.80 1.98 2.10 2.28 2.38 2.75 3.20 3.65 4.60 5.50 6.50 7.38 9.25 9.38 11.12 11.38
1.25 1.55 1.85 2.10 2.40 2.70 2.90 3.50 4.10 4.60 5.50 6.90 8.50 9.90 11.50 12.90 14.50 17.50 20.50 23.20 26.50 29.50 32.80 36.00
1.305 1.612 1.912 2.197 2.458 2.740 3.022 3.606 4.165 4.724 5.588 7.035 8.636 10.033 11.607 13.081 14.681 17.678 20.575 23.571 26.746 29.921 33.096 36.271
0.80 0.90 1.00 1.20 1.40 1.45 1.60 1.75 1.95 2.05 2.20 2.20 2.70 3.20 3.50 4.00 4.50 5.00 5.30 5.50 6.30 6.50 7.00 7.30 7.50 8.00 8.30 8.80 9.00 9.30 9.50 10.00 10.30 10.50 10.80
1.182 1.474 1.756 2.025 2.271 2.551 2.820 3.404 3.963 4.496 5.360 6.782 8.382 9.729 11.329 12.751 14.351 17.323 20.270 23.114 26.289 29.464 32.639 35.814
0.783 0.883 0.983 1.183 1.383 1.460 1.583 1.729 1.929 2.001 2.121 2.186 2.621 3.121 3.459 3.959 4.459 4.959 5.188 5.400 6.188 6.400 6.917 7.188 7.400 7.917 8.188 8.647 8.917 9.188 9.400 8.917 10.188 10.376 10.647