螺丝攻牙钻孔径和滚丝径对照表

M1.0×0.25 0.75 0.785 0.729 NO.1-64(1.854) 1.55 1.582 1.425 M1.1×0.25 0.85 0.885 0.829 NO.2-56(2.184) 1.80 1.871 1.695 M1.2×0.25 0.95 0.985 0.985 NO.3-48(2.515) 2.10 2.146 1.941 M1.4×0.3 1.10 1.142 1.075 NO.4-40(2.845) 2.30 2.385 2.157 M1.6×0.35 1.25 1.321 1.221 NO.5-40(3.175) 2.60 2.697 2.487 M1.7×0.35 1.35 1.421 1.321 NO.6-32(3.505) 2.80 2.895 2.642 M1.8×0.35 1.45 1.521 1.421 NO8-32(4.166) 3.40 3.53 3.302 M2.0×0.4 1.60 1.679 1.567 NO.10-24(4.826) 3.90 3.962 3.683 M2.2×0.45 1.75 1.838 1.713 NO.12-24(5.486) 4.50 4.597 4.344 M2.3×0.4 1.90 1.979 1.867 1/4-20 5.10 5.257 4.979

M2.5×0.45 2.10 2.138 2.013 5/16-18 6.60 6.731 6.401

M2.6×0.45 2.20 2.238 2.113 3/8-16 8.00 8.153 7.798

M3.0×0.5 2.50 2.599 2.459 7/16-14 9.40 9.55 9.144

M3.0×0.6 2.40 2.440 2.280 1/2-13 10.80 11.023 10.592 M3.5×0.6 2.90 3.010 2.850 9/16-12 12.20 12.446 11.989 M4.0×0.7 3.30 3.422 3.242 5/8-11 13.60 12.868 13.386 M4.0×0.75 3.25 3.326 3.106 3/4-10 16.50 18.840 16.307 M4.5×0.75 3.80 3.878 3.688 7/8-9 19.50 19.761 19.177 M5.0×0.8 4.20 4.334 4.134 1 22.20 22.606 21.971

M5.0×0.9 4.10 4.170 3.930 1-1/8-7 25.00 25.349 24.638 M6.0×1.0 5.00 5.153 4.917 1-1/4-7 28.20 28.524 27.813 M7.0×1.0 6.00 6.153 5.917 1-3/8-6 30.80 31.115 30.353 M8.0×1.25 6.80 6.912 6.647 1-1/2-6 34.00 34.290 33.528 M9.0×1.25 7.80 7.912 7.647 1-3/4-5 39.50 39.827 38.964 M10×1.5 8.50 8.676 8.376 2-4-1/2 45.20 45.593 44.679 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

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 1.182

最实用对照!

M1.1×0.2 0.90 0.921 0.883 NO.1-72(1.854) 1.55 1.612 1.474 M1.2×0.2 1.00 1.021 0.983 NO.2-64(2.184) 1.85 1.912 1.756 M1.4×0.2 1.20 1.221 1.183 NO.3-56(2.515) 2.10 2.197 2.025 M1.6×0.2 1.40 1.421 1.383 NO.4-48(2.845) 2.40 2.458 2.271 M1.7×0.2 1.45 1.500 1.460 NO.5-44(3.175) 2.70 2.740 2.551 M1.8×0.2 1.60 1.621 1.583 NO.6-40(3.505) 2.90 3.022 2.820 M2.0×0.25 1.75 1.785 1.729 NO.8-36(4.166) 3.50 3.606 3.404 M2.2×0.25 1.95 1.985 1.929 NO.10-32(4.826) 4.10 4.165 3.963 M2.3×0.25 2.05 2.061 2.001 NO.12-28(5.846) 4.60 4.724 4.496 M2.5×0.35 2.20 2.221 2.121 1/4-28 5.50 5.588 5.360 M2.6×0.35 2.20 2.246 2.186 5/16-24 6.90 7.035 6.782 M3.0×0.35 2.70 2.721 2.621 3/8-24 8.50 8.636 8.382 M3.5×0.35 3.20 3.221 3.121 7/16-20 9.90 10.033 9.729 M4.0×0.5 3.50 3.599 3.459 1/2-20 11.50 11.607 11.329 M4.5×0.5 4.00 4.099 3.959 9/16-18 12.90 13.081 12.751 M5.0×0.5 4.50 4.599 4.459 5/8-18 14.50 14.681 14.351 M5.5×0.5 5.00 5.099 4.959 3/4-16 17.50 17.678 17.323 M6.0×0.75 5.30 5.378 5.188 7/8-14 20.50 20.675 20.270 M6.0×0.5 5.50 5.550 5.400 1-12 23.20 23.571 23.114

M7.0×0.75 6.30 6.378 6.188 1-1/8-12 26.50 26.746 26.289 M7.0×0.5 6.50 6.550 6.400 1-1/4-12 29.50 29.921 29.464 M8.0×1.0 7.00 7.153 6.917 1-3/8-12 32.80 33.096 32.639 M8.0×0.75 7.30 7.378 7.188 1-1/2-12 36.00 36.271 35.814 M8.0×0.5 7.50 7.520 7.400

M9.0×1.0 8.00 8.153 7.917

M9.0×0.75 8.30 8.378 8.188

M10×1.25 8.80 8.912 8.647

M10×1.0 9.00 9.153 8.917

M10×0.75 9.30 9.378 9.188

M10×0.5 9.50 9.520 9.400

M11×1.0 10.00 10.153 9.917

M11×0.75 10.30 10.378 10.188

M12×1.5 10.50 10.676 10.376

M12×1.25 10.80 10.912 10.647

M12×1.0 11.00 11.153 10.917

M12×0.5 11.50 11.520 11.400