公制粗螺紋 | ||||
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 | |
M1.1×0.25 | 0.85 | 0.885 | 0.829 | |
M1.2×0.25 | 0.95 | 0.985 | 0.985 | |
M1.4×0.3 | 1.10 | 1.142 | 1.075 | |
M1.6×0.35 | 1.25 | 1.321 | 1.221 | |
M1.7×0.35 | 1.35 | 1.421 | 1.321 | |
M1.8×0.35 | 1.45 | 1.521 | 1.421 | |
M2.0×0.4 | 1.60 | 1.679 | 1.567 | |
M2.2×0.45 | 1.75 | 1.838 | 1.713 | |
M2.3×0.4 | 1.90 | 1.979 | 1.867 | |
M2.5×0.45 | 2.10 | 2.138 | 2.013 | |
M2.6×0.45 | 2.20 | 2.238 | 2.113 | |
M3.0×0.5 | 2.50 | 2.599 | 2.459 | |
M3.0×0.6 | 2.40 | 2.440 | 2.280 | |
M3.5×0.6 | 2.90 | 3.010 | 2.850 | |
M4.0×0.7 | 3.30 | 3.422 | 3.242 | |
M4.0×0.75 | 3.25 | 3.326 | 3.106 | |
M4.5×0.75 | 3.80 | 3.878 | 3.688 | |
M5.0×0.8 | 4.20 | 4.334 | 4.134 | |
M5.0×0.9 | 4.10 | 4.170 | 3.930 | |
M6.0×1.0 | 5.00 | 5.153 | 4.917 | |
M7.0×1.0 | 6.00 | 6.153 | 5.917 | |
M8.0×1.25 | 6.80 | 6.912 | 6.647 | |
M9.0×1.25 | 7.80 | 7.912 | 7.647 | |
M10×1.5 | 8.50 | 8.676 | 8.376 | |
M11×1.5 | 9.50 | 9.676 | 9.376 | |
M12×1.75 | 10.30 | 10.441 | 10.106 | |
M14×2.0 | 12.00 | 12.210 | 11.835 | |
M16×2.0 | 14.00 | 14.210 | 13.835 | |
M18×2.5 | 15.50 | 15.744 | 15.294 | |
M20×2.5 | 17.50 | 17.744 | 17.294 | |
M22×2.5 | 19.50 | 19.744 | 19.294 | |
M24×3.0 | 21.00 | 21.252 | 20.752 | |
M27×3.0 | 24.00 | 24.252 | 23.752 | |
M30×3.5 | 26.50 | 26.771 | 26.211 | |
美製粗螺紋 | ||||
規格(UNC) | 標準徑 | 2級牙鑽孔徑 | ||
最大 | 最小 | |||
NO.1-64(1.854) | 1.55 | 1.582 | 1.425 | |
NO.2-56(2.184) | 1.80 | 1.871 | 1.695 | |
NO.3-48(2.515) | 2.10 | 2.146 | 1.941 | |
NO.4-40(2.845) | 2.30 | 2.385 | 2.157 | |
NO.5-40(3.175) | 2.60 | 2.697 | 2.487 | |
NO.6-32(3.505) | 2.80 | 2.895 | 2.642 | |
NO8-32(4.166) | 3.40 | 3.53 | 3.302 | |
NO.10-24(4.826) | 3.90 | 3.962 | 3.683 | |
NO.12-24(5.486) | 4.50 | 4.597 | 4.344 | |
1/4-20 | 5.10 | 5.257 | 4.979 | |
5/16-18 | 6.60 | 6.731 | 6.401 | |
3/8-16 | 8.00 | 8.153 | 7.798 | |
7/16-14 | 9.40 | 9.55 | 9.144 | |
1/2-13 | 10.80 | 11.023 | 10.592 | |
9/16-12 | 12.20 | 12.446 | 11.989 | |
5/8-11 | 13.60 | 12.868 | 13.386 | |
3/4-10 | 16.50 | 18.840 | 16.307 | |
7/8-9 | 19.50 | 19.761 | 19.177 | |
1 | 22.20 | 22.606 | 21.971 | |
1-1/8-7 | 25.00 | 25.349 | 24.638 | |
1-1/4-7 | 28.20 | 28.524 | 27.813 | |
1-3/8-6 | 30.80 | 31.115 | 30.353 | |
1-1/2-6 | 34.00 | 34.290 | 33.528 | |
1-3/4-5 | 39.50 | 39.827 | 38.964 | |
2-4-1/2 | 45.20 | 45.593 | 44.679 |