螺纹攻牙钻孔底径和滚造径对照表

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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 0.729 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 0.9850.985 NO.3-48(2.515) 2.10 2.146 1.941M1.4×0.3 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 3.302M2.0×0.4 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 4.979M2.5×0.45 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 22.20 22.606 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 1.460 NO.5-44(3.175) 2.70 2.740 2.551M1.8×0.2 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 5.360M2.6×0.35 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 1-1/4-12 29.50 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 10.188. .M12×1.5 10.50 10.676 10.376M12×1.25 10.80 10.912 10.647M12×1.0 11.00 11.153 10.917M12×0.5 11.50 11.520 11.400M14×1.5 12.50 12.676 12.376M14×1.0 13.00 13.153 12.917M15×1.5 13.50 13.676 13.376M15×1.0 14.00 14.153 13.917M16×1.5 14.50 14.676 14.376M16×1.0 15.00 15.153 14.917M17×1.5 15.50 15.676 15.376M17×1.0 16.00 16.153 15.917M18×2.0 16.00 16.210 15.835M18×1.5 16.50 16.676 16.376M18×1.0 17.00 17.153 16.917M20×2.0 18.00 18.210 17.835M20×1.5 18.50 18.676 18.376M20×1.0 19.00 19.153 18.917M22×2.0 20.00 20.210 19.835M22×1.5 20.50 20.676 20.376M22×1.0 21.00 21.153 20.917M24×2.0 22.00 22.210 21.835M24×1.5 22.50 22.676 22.376M24×1.0 23.00 23.153 22.917M25×2.0 23.00 23.210 22.835M25×1.5 23.50 23.676 23.376M25×1.0 24.00 24.153 23.917M26×1.5 24.50 24.676 24.376M27×2.0 25.00 25.210 24.835M27×1.5 25.50 25.676 25.376M27×1.0 26.00 26.153 25.917M28×2.0 26.00 26.210 25.835M28×1.5 26.50 26.676 26.376M28×1.0 27.00 27.153 26.917M30×3.0 27.00 27.252 26.752M30×2.0 28.00 28.210 27.835M30×1.5 28.50 28.676 28.376M30×1.0 29.00 29.153 28.917. v .M32×2.0 30.00 30.210 29.835M32×1.5 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 －－M1.7×0.35 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 － 8.74 8.81M2.6×0.45 2.35 2.38 － 7/16-14 － 10.20 10.30 M3.0×0.5 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 －－M6.0×1.0 5.45 5.50 5.55 NO.5-44 2.86 －－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 4.39 4.43 －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 4.0-4.21/4 -32 5.60 5.690 5.486 3BA5/16 -32 7.10 7.264 7.087 4BA 3.0-3.23/8 -32 8.70 8.865 8.661 5BA 2.7-2.87/16 -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 2.63-2.60 SM1/8-40 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 3.128-3.083 W 1/4 - 20 5.10 5.00 M4.0×0.7 3.49-3.45 SM11/64-40 3.855-3.805 W 5/16 - 18 6.60 6.50 M4.0×0.75 3.45-3.41 SM3/16-32 4.205-4.155 W 3/8 - 16 8.00 7.90 M4.5×0.75 3.96-3.92 SM3/16-28 4.143-4.093 W 7/16 - 14 9.40 9.30 M5.0×0.8 4.43-4.38 SM7/32-32 5.003-4.955 W 1/2 - 12 10.70 10.50 M5.0×0.9 4.36-4.31 SM15/64-28 5.325-5.570 W 9/16 - 12 12.30 12.00 M6.0×1.0 5.30-5.25 SM1/4-40 5.890-5.735 W 5/8 - 11 13.70 13.50 M7.0×1.0 6.30-6.25 SM1/4-28 5.721-5.366 W 3/4 - 10 16.70 16.50 M8.0×1.0 7.28-7.23 SM9/32-28 6.508-6.648 W 7/8 - 9 19.50 19.30 M8.0×1.25 7.12-7.07 SM11/32-28 8.092-8.432 W1 - 8 22.40 22.00 SM3/8-28 8.880-8.015W 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 11.819-11.749. v .SM9/26-20 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 - 278.33 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 38.339 1-1/4-11-1/2 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 44.232 1-1/2-11-1/2 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。

各种制式螺纹攻牙钻孔径和滚造径对照表

各种制式螺纹攻牙钻孔径和滚造径对照表，太全了金属加工2015-10-17 关注作者原文地址本表所推选钻头孔径，是针对攻牙加工时，能够很容易的了解钻头直径；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，精度有很大影响，所以使用本表之钻孔径，若有不当之处，应实际状况适当的变更钻头直径，本表依据2级牙制订。

公制精螺纹规格标准径2级牙钻孔径最大最小M1.0×0.25 0.75 0.785 0.729M1.1×0.25 0.85 0.885 0.829M1.2×0.25 0.95 0.985 0.929M1.4×0.3 1.10 1.142 1.075M1.6×0.35 1.25 1.321 1.221M1.7×0.35 1.35 1.421 1.321M1.8×0.35 1.45 1.521 1.421M2.0×0.4 1.60 1.679 1.567M2.2×0.45 1.75 1.838 1.713M2.3×0.4 1.90 1.979 1.867M2.5×0.45 2.10 2.138 2.013M2.6×0.45 2.20 2.238 2.113M3.0×0.5 2.50 2.599 2.459M3.0×0.6 2.40 2.44 2.280M3.5×0.6 2.90 3.010 2.850M4.0×0.7 3.30 3.422 3.242M4.0×0.75 3.25 3.326 3.106M4.5×0.75 3.80 3.878 3.688M5.0×0.8 4.20 4.334 4.134M5.0×0.9 4.10 4.170 3.930M6.0×1.0 5.00 5.153 4.917M7.0×1.0 6.00 6.153 5.917M8.0×1.25 6.80 6.912 6.647M9.0×1.25 7.80 7.912 7.647M10×1.5 8.50 8.676 8.376M11×1.5 9.50 9.676 9.376M12×1.75 10.30 10.441 10.106M14×2.0 12.00 12.210 11.735M16×2.0 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 2.752M27×3.0 24.00 24.252 23.752M30×3.5 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 0.783M1.1×0.2 0.90 0.921 0.883M1.2×0.2 1.00 1.021 0.983M1.4×0.2 1.20 1.221 0.183M1.6×0.2 1.40 1.421 1.383M1.7×0.2 1.45 1.500 1.460M1.8×0.2 1.60 1.621 1.583M2.0×0.25 1.75 1.785 1.729M2.2×0.25 1.95 1.985 1.929M2.3×0.25 2.05 2.061 2.001M2.5×0.35 2.20 2.221 2.121M2.6×0.35 2.20 2.246 2.186M3.0×0.35 2.70 2.721 2.621M3.5×0.35 3.20 3.221 3.121M4.0×0.5 3.50 3.599 3.459M4.5×0.5 4.00 4.099 3.959M5×0.5 4.50 4.599 4.459M5.5×0.5 5.00 5.099 4.959M6.0×0.75 5.30 5.378 5.188M6.0×0.5 5.50 5.550 5.400M7.0×0.75 6.30 6.378 61.88M7.0×0.5 6.50 6.550 64.00M8.0×1.0 7.00 7.153 6.917M8.0×0.75 7.30 7.378 7.188M8×0.5 7.50 7.520 7.400M9×1.0 8.00 8.153 7.917M9×0.75 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 10.188 M11×1.5 10.50 10.676 10.376M12×1.25 10.80 10.912 10.647 公制细螺纹规格标准径2级牙钻孔径最大最小M12×1.0 11.00 11.153 10.917M12×0.5 11.50 11.520 11.4M14×1.5 12.50 12.676 12.376M14×1.0 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 16.670 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 M20×2.0 20.00 20.210 19.835 M22×1.5 20.50 20.676 20.376 M22×1.0 21.00 21.153 20.917 M24×2.0 22.00 22.210 21.835 M24×1.5 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 30.376 M33×3.0 30.00 30.252 29.752 M33×2.0 31.00 31.210 30.835 M33×1.5 31.50 31.376 31.376 M35×1.5 33.50 33.676 33.376 M36×3.0 33.00 33.252 32.752 M36×2.0 34.00 34.210 33.835 M36×1.5 34.50 34.676 34.376 美制细螺纹规格(UNF) 标准径2级牙钻孔径最大最小番数牙外径NO.0-80(1.524) 1.25 1.305 1.182 NO.1-72(1.854) 1.55 1.612 1.474 NO.2-64(2.184) 1.85 1.912 1.756 NO.3-56(2.515) 2.10 2.197 2.025 NO.4-48(2.845) 2.40 2.458 2.271 NO.5-44(3.175) 2.70 2.740 2.551 NO.6-40(3.505) 2.90 3.022 2.820 NO.8-36(4.166) 3.50 3.606 3.404 NO.10-32(4.826) 4.10 4.165 3.963 NO.12-28(5.846) 4.60 4.724 4.496 1/4 -28 5.50 5.588 5.3605/16 -24 6.90 7.035 6.7823/8 -24 8.50 8.636 8.3827/16 -20 9.90 10.033 9.7291/2 -20 11.50 11.607 11.3299/16 -18 12.90 13.081 12.7515/8 -18 14.50 14.681 14.3513/4 -16 17.50 14.678 17.3237/8 -14 20.50 20.675 20.2701 -12 23.20 23.571 23.1141-1/8 -12 26.50 26.746 26.2891-1/4 -12 29.50 29.921 29.4641-3/8 -12 32.80 33.096 32.4641-1/2 -12 36.00 36.270 35.814无屑丝攻钻孔径规格精度等级RH4.5.6 RH7.8 RH9M1.0×0.25 0.86 0.88 -M1.1×0.25 0.96 0.98 -M1.2×0.25 1.06 1.08 -M1.4×0.3 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 -M2.0×0.4 1.78 1.80 -M2.2×0.45 1.95 1.98 -M2.3×0.4 2.08 2.10 -M2.5×0.45 2.25 2.28 -M2.6×0.45 2.35 1.38 -M3.0×0.5 2.73 2.75 -M3.0×0.6 3.17 3.20 -M4.0×0.7 3.62 3.65 3.69M5.0×0.8 4.56 4.60 4.64M6.0×1.0 5.45 5.50 5.55M7.0×1.0 6.45 6.50 6.55M8.0×1.25 7.31 7.38 7.44M10×1.5 9.18 9.25 9.32M10×1.25 9.31 9.38 9.44M12×1.75 11.04 11.12 11.21M12×1.25 11.31 11.38 11.44注:无槽丝攻之钻孔径,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，因此参考上表之同时,亦请增减若干.美制管螺纹规格(UNEF) 标准径2级牙钻孔径最大最小NO.12 -32 4.70 4.826 4.6231/4 -32 5.60 5.690 5.4865/16 -32 7.10 7.264 7.0873/8 -32 8.70 8.865 8.6617/16 -28 10.20 10.338 10.1351/2 -28 11.80 11.938 11.7099/16 -28 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美制粗螺纹规格(UNC) 标准径2级牙钻孔径番数牙外径最大最小NO.1-64(1.854) 1.55 1.582 1.425NO.2-56(2.184) 1.80 1.871 1.695NO.3-48(2.515) 2.10 2.146 1.941NO.4-40(2.845) 2.30 2.385 2.157NO.5-40(3.175) 2.60 2.697 2.487NO.6-32(3.505) 2.80 2.895 2.642NO.8-32(4.166) 3.40 3.530 3.302NO.10-24(4.826) 3.90 3.962 3.682NO.12-24(5.846) 4.50 4.597 4.3441/4 -20 5.10 5.257 4.9795/16 -18 6.60 6.731 6.4013/8 -16 8.00 8.153 7.9877/16 -14 9.40 9.500 9.1441/2 -13 10.80 11.023 10.5929/16 -12 12.20 12.446 11.9895/8 -11 13.60 12.868 13.3863/4 -10 16.20 16.840 16.3071 -8 22.20 22.606 21.9711-1/8 -7 25.00 25.349 24.6381-1/4 -7 28.20 28.524 27.8131-3/8 -6 30.80 31.115 30.3531-1/2 -6 34.00 34.290 33.5281-3/4 -5 39.50 39.827 38.9642 -4-1/2 45.20 45.593 44.679英制螺纹规格钻孔径硬材软材W1/8 - 40 2.65 2.60W5/32 - 32 3.25 3.20W3/16 - 24 3.75 3.70W1/4 - 20 5.10 5.00W5/16 - 18 6.60 6.50W3/8 - 16 8.00 7.90W7/16 - 14 9.40 9.30W1/2 - 12 10.70 10.50W9/16 - 12 12.30 12.00W5/8 - 11 13.70 13.50W3/4 - 10 16.70 16.50W7/8 - 9 19.50 19.30W1 - 8 22.40 22.00W1-1/8 - 7 25.00 24.80W1-1/4 - 7 28.30 28.00英制管螺纹规格标准径钻孔径最大最小PS1/16 -28 6.50 6.632 6.490PS1/8 -28 8.50 8.637 8.495PS1/4 - 19 11.40 11.549 11.341PS3/8 - 19 15.00 15.054 14.846PS1/2 - 14 18.50 18.773 18.489PS3/4 - 14 24.00 24.259 23.975PS1 - 11 30.20 30.471 30.111PS1-1/4 -11 38.80 39.132 38.772PS1-1/2 -11 44.80 45.025 44.665PS2 - 11 56.50 56.836 56.476英制管螺纹规格标准径有效牙部之长度(最小)中之母螺牙内径标准长度(最小)中之母螺牙内径使用绞刀时不用绞刀时PT1/16 -28 6.10 6.2 6.244 6.384PT1/4 -19 10.70 11 10.962 11.174PT3/8 -19 14.20 14.5 14.448 14.658PT1/2 -14 17.60 18 17.979 18.263PT3/4 -14 23.00 23.5 23.378 23.663Pt1 -11 29.00 29.5 29.459 29.822PT1-1/4 -11 37.50 38 37.976 38.339 PT1-1/2 -11 43.40 44 43.869 44.232 Pt2 -11 54.90 55.5 55.412 55.844美制螺纹滚造径规格钻孔径NPT NPS使用绞刀时不用绞刀时1/16 -27 6.1 6.25 6.351/8 -27 8.33 8.43 8.741/4 -18 10.72 11.13 11.133/8 -18 14.27 14.27 14.681/2 -14 17.48 17.86 18.263/4 -14 22.63 23.01 23.421 -11-1/2 28.58 28.98 29.361-1/4-11-1/2 37.31 37.69 38.11-1/2-11-1/2 43.66 44.04 44.452 -11-1/2 55.58 55.96 56.36英制螺纹滚造径规格滚造径W 3/16 - 24 4.08 - 4.05W 1/4 - 20 5.51 - 5.46W 5/16 - 18 7.01 - 6.95W 3/8 - 16 8.48 - 8.41W 7/16 - 14 9.92 - 9.85W 1/2 - 12 11.31 - 11.24W 9/16 -12 12.89 - 12.82公制螺纹规格滚造径M3.0×0.5 2.63 2.60M3.0×0.6 2.56 2.53M3.5×0.6 3.06 3.03M4.0×0.7 3.49 3.45M4.0×0.75 3.45 3.41M4.5×0.75 3.96 3.92M5.0×0.8 4.43 4.38M5.0×0.9 4.36 4.31M6.0×1.0 5.30 5.25M7.0×1.0 6.30 6.25M8.0×1.0 7.28 - 7.23M8.0×1.25 7.12 - 7.07M9.0×1.25 8.12 - 8.07M10×1.25 9.10 - 9.04M10×1.5 8.97 - 8.91M11×1.5 9.97 - 9.91M12×1.5 10.92 - 10.87M12×1.75 10.79 - 10.73 M14×2.0 12.63 - 12.56M16×2.0 14.63 - 14.56M18×2.5 16.31 - 16.23M20×2.5 18.31 - 18.23M22×2.5 20.31 - 20.23针车用螺纹规格(UNC) 滚造径SM 1/8 40 2.735 -2.688 SM 1/8 44 2.769 -2.722 SM 9/64 40 3.128 -3.083 SM 11/64 40 3.855 -3.805 SM 3/16 32 4.205 -4.155 SM 3/16 28 4.143 -4.093 SM 7/32 32 5.003 -4.955 SM 15/64 28 5.325 -4.955 SM 1/4 40 5.890 -5.735 SM 1/4 28 5.721 -5.366 SM 9/32 28 6.528 -6.648 SM 11/32 28 8.092 -8.432 SM 3/8 29 8.880 -8.015 SM 7/16 30 10.466 -10.401 SM 7/16 16 10.037 -9.967 SM 1/2 20 11.819 -11.749 SM 9/16 20 13.400 -13.425 美制粗螺纹规格(UNC) 滚造径NO.5-40 2.70 - 2.67NO.6-32 2.95 - 2.91NO.8-32 3.60 - 3.57NO.10-24 4.09 - 4.05NO.12-24 4.75 - 4.701/4 -20 5.50 - 5.455/16 -18 6.98 - 6.933/8 -16 8.45 - 8.407/16 -14 9.89 - 9.831/2 -13 11.39 - 11.329/16 -12 12.87 - 12.80美制细螺纹规格(UNF) 滚造径NO.5-44 2.73 - 2.70NO.6-40 3.05 - 3.02NO.8-36 3.66 - 3.63NO.10-32 4.26 - 4.80NO.12-28 4.84 - 4.801/4 -28 5.72 - 5.685/16 -24 7.20 - 7.163/8 -24 8.79 - 8.747/16 -20 10.23 - 10.181/2 -20 11.82 - 11.76本表所推选钻头孔径,是针对攻牙加工时,能够很容易的了解钻头直径;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,精度有很大影响,所以使用本表之钻孔径,若有不当之处,应实际状况适当的变更钻头直径,本表依据2级牙制订.公制精螺纹规格标准径2级牙钻孔径最大最小M1.0×0.25 0.75 0.785 0.729M1.1×0.25 0.85 0.885 0.829M1.2×0.25 0.95 0.985 0.929M1.4×0.3 1.10 1.142 1.075M1.6×0.35 1.25 1.321 1.221M1.7×0.35 1.35 1.421 1.321M1.8×0.35 1.45 1.521 1.421M2.0×0.4 1.60 1.679 1.567M2.2×0.45 1.75 1.838 1.713M2.3×0.4 1.90 1.979 1.867M2.5×0.45 2.10 2.138 2.013M2.6×0.45 2.20 2.238 2.113M3.0×0.5 2.50 2.599 2.459M3.0×0.6 2.40 2.44 2.280M3.5×0.6 2.90 3.010 2.850M4.0×0.7 3.30 3.422 3.242M4.0×0.75 3.25 3.326 3.106M4.5×0.75 3.80 3.878 3.688M5.0×0.8 4.20 4.334 4.134M5.0×0.9 4.10 4.170 3.930M6.0×1.0 5.00 5.153 4.917M7.0×1.0 6.00 6.153 5.917M8.0×1.25 6.80 6.912 6.647M9.0×1.25 7.80 7.912 7.647M10×1.5 8.50 8.676 8.376M11×1.5 9.50 9.676 9.376M12×1.75 10.30 10.441 10.106 M14×2.0 12.00 12.210 11.735M16×2.0 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 2.752M27×3.0 24.00 24.252 23.752M30×3.5 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 0.783M1.1×0.2 0.90 0.921 0.883M1.2×0.2 1.00 1.021 0.983M1.4×0.2 1.20 1.221 0.183M1.6×0.2 1.40 1.421 1.383M1.7×0.2 1.45 1.500 1.460M1.8×0.2 1.60 1.621 1.583M2.0×0.25 1.75 1.785 1.729M2.2×0.25 1.95 1.985 1.929M2.3×0.25 2.05 2.061 2.001M2.5×0.35 2.20 2.221 2.121M2.6×0.35 2.20 2.246 2.186M3.0×0.35 2.70 2.721 2.621M3.5×0.35 3.20 3.221 3.121M4.0×0.5 3.50 3.599 3.459M4.5×0.5 4.00 4.099 3.959M5×0.5 4.50 4.599 4.459M5.5×0.5 5.00 5.099 4.959M6.0×0.75 5.30 5.378 5.188M6.0×0.5 5.50 5.550 5.400M7.0×0.75 6.30 6.378 61.88M7.0×0.5 6.50 6.550 64.00M8.0×1.0 7.00 7.153 6.917M8.0×0.75 7.30 7.378 7.188M8×0.5 7.50 7.520 7.400M9×1.0 8.00 8.153 7.917M9×0.75 8.30 8.378 8.188M10×1.25 8.80 8.912 8.647M10×1.0 9.00 9.153 8.917M10×0.5 9.50 9.520 9.400M11×1.0 10.00 10.153 9.917M11×0.75 10.30 10.378 10.188 M11×1.5 10.50 10.676 10.376M12×1.25 10.80 10.912 10.647 公制细螺纹规格标准径2级牙钻孔径最大最小M12×1.0 11.00 11.153 10.917M12×0.5 11.50 11.520 11.4M14×1.5 12.50 12.676 12.376M14×1.0 13.00 13.153 12.917M15×1.5 13.50 13.676 13.376M15×1.0 14.00 14.153 13.917M16×1.5 14.50 14.676 14.376M16×1.0 15.00 15.153 14.917M17×1.5 15.50 15.676 15.376M17×1.0 16.00 16.153 15.917M18×2.0 16.00 16.210 15.835M18×1.5 16.50 16.670 16.376M18×1.0 17.00 17.153 16.917M20×2.0 18.00 18.210 17.835M20×1.5 18.50 18.676 18.376M20×1.0 19.00 19.153 18.917M20×2.0 20.00 20.210 19.835M22×1.5 20.50 20.676 20.376M22×1.0 21.00 21.153 20.917M24×2.0 22.00 22.210 21.835M24×1.5 22.50 22.676 22.376M24×1.0 23.00 23.153 22.917M25×2.0 23.00 23.210 22.835M25×1.5 23.50 23.676 23.376M25×1.0 24.00 24.153 23.917M26×1.5 24.50 24.676 24.376M27×2.0 25.00 25.210 24.835M27×1.5 25.50 25.676 25.376M27×1.0 26.00 26.153 25.917M28×2.0 26.00 26.210 25.835M28×1.5 26.50 26.676 26.376M28×1.0 27.00 27.153 26.917M30×3.0 27.00 27.252 26.752M30×2.0 28.00 28.210 27.835M30×1.5 28.50 28.676 28.376M32×2.0 30.00 30.210 29.835M32×1.5 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 31.376 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美制细螺纹规格(UNF) 标准径2级牙钻孔径最大最小番数牙外径NO.0-80(1.524) 1.25 1.305 1.182 NO.1-72(1.854) 1.55 1.612 1.474 NO.2-64(2.184) 1.85 1.912 1.756 NO.3-56(2.515) 2.10 2.197 2.025 NO.4-48(2.845) 2.40 2.458 2.271 NO.5-44(3.175) 2.70 2.740 2.551 NO.6-40(3.505) 2.90 3.022 2.820 NO.8-36(4.166) 3.50 3.606 3.404 NO.10-32(4.826) 4.10 4.165 3.963 NO.12-28(5.846) 4.60 4.724 4.496 1/4 -28 5.50 5.588 5.3605/16 -24 6.90 7.035 6.7823/8 -24 8.50 8.636 8.3827/16 -20 9.90 10.033 9.7291/2 -20 11.50 11.607 11.3299/16 -18 12.90 13.081 12.7515/8 -18 14.50 14.681 14.3513/4 -16 17.50 14.678 17.3237/8 -14 20.50 20.675 20.2701 -12 23.20 23.571 23.1141-1/8 -12 26.50 26.746 26.2891-1/4 -12 29.50 29.921 29.4641-3/8 -12 32.80 33.096 32.4641-1/2 -12 36.00 36.270 35.814无屑丝攻钻孔径规格精度等级RH4.5.6 RH7.8 RH9M1.0×0.25 0.86 0.88 -M1.1×0.25 0.96 0.98 -M1.2×0.25 1.06 1.08 -M1.4×0.3 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 -M2.0×0.4 1.78 1.80 -M2.2×0.45 1.95 1.98 -M2.3×0.4 2.08 2.10 -M2.5×0.45 2.25 2.28 -M2.6×0.45 2.35 1.38 -M3.0×0.5 2.73 2.75 -M3.0×0.6 3.17 3.20 -M4.0×0.7 3.62 3.65 3.69M5.0×0.8 4.56 4.60 4.64M6.0×1.0 5.45 5.50 5.55M7.0×1.0 6.45 6.50 6.55M8.0×1.25 7.31 7.38 7.44M10×1.5 9.18 9.25 9.32M10×1.25 9.31 9.38 9.44M12×1.75 11.04 11.12 11.21M12×1.25 11.31 11.38 11.44注:无槽丝攻之钻孔径,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，因此参考上表之同时,亦请增减若干.美制管螺纹规格(UNEF) 标准径2级牙钻孔径最大最小NO.12 -32 4.70 4.826 4.6231/4 -32 5.60 5.690 5.4865/16 -32 7.10 7.264 7.0873/8 -32 8.70 8.865 8.6617/16 -28 10.20 10.338 10.1351/2 -28 11.80 11.938 11.7099/16 -28 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美制粗螺纹规格(UNC) 标准径2级牙钻孔径番数牙外径最大最小NO.1-64(1.854) 1.55 1.582 1.425NO.2-56(2.184) 1.80 1.871 1.695NO.3-48(2.515) 2.10 2.146 1.941NO.4-40(2.845) 2.30 2.385 2.157NO.5-40(3.175) 2.60 2.697 2.487NO.6-32(3.505) 2.80 2.895 2.642 NO.8-32(4.166) 3.40 3.530 3.302 NO.10-24(4.826) 3.90 3.962 3.682 NO.12-24(5.846) 4.50 4.597 4.344 1/4 -20 5.10 5.257 4.9795/16 -18 6.60 6.731 6.4013/8 -16 8.00 8.153 7.9877/16 -14 9.40 9.500 9.1441/2 -13 10.80 11.023 10.5929/16 -12 12.20 12.446 11.9895/8 -11 13.60 12.868 13.3863/4 -10 16.20 16.840 16.3077/8 -9 19.50 19.761 19.1771 -8 22.20 22.606 21.9711-1/8 -7 25.00 25.349 24.6381-1/4 -7 28.20 28.524 27.8131-3/8 -6 30.80 31.115 30.3531-1/2 -6 34.00 34.290 33.5281-3/4 -5 39.50 39.827 38.9642 -4-1/2 45.20 45.593 44.679英制螺纹规格钻孔径硬材软材W1/8 - 40 2.65 2.60W5/32 - 32 3.25 3.20W3/16 - 24 3.75 3.70W1/4 - 20 5.10 5.00W5/16 - 18 6.60 6.50W3/8 - 16 8.00 7.90W7/16 - 14 9.40 9.30W1/2 - 12 10.70 10.50W9/16 - 12 12.30 12.00W5/8 - 11 13.70 13.50W3/4 - 10 16.70 16.50W7/8 - 9 19.50 19.30W1 - 8 22.40 22.00W1-1/8 - 7 25.00 24.80W1-1/4 - 7 28.30 28.00英制管螺纹规格标准径钻孔径最大最小PS1/16 -28 6.50 6.632 6.490PS1/8 -28 8.50 8.637 8.495PS1/4 - 19 11.40 11.549 11.341PS3/8 - 19 15.00 15.054 14.846PS1/2 - 14 18.50 18.773 18.489PS3/4 - 14 24.00 24.259 23.975PS1 - 11 30.20 30.471 30.111PS1-1/4 -11 38.80 39.132 38.772PS1-1/2 -11 44.80 45.025 44.665PS2 - 11 56.50 56.836 56.476英制管螺纹规格标准径有效牙部之长度(最小)中之母螺牙内径标准长度(最小)中之母螺牙内径使用绞刀时不用绞刀时PT1/16 -28 6.10 6.2 6.244 6.384PT1/8 -28 8.10 8.2 8.249 8.388PT1/4 -19 10.70 11 10.962 11.174PT3/8 -19 14.20 14.5 14.448 14.658PT1/2 -14 17.60 18 17.979 18.263PT3/4 -14 23.00 23.5 23.378 23.663Pt1 -11 29.00 29.5 29.459 29.822PT1-1/4 -11 37.50 38 37.976 38.339PT1-1/2 -11 43.40 44 43.869 44.232Pt2 -11 54.90 55.5 55.412 55.844美制螺纹滚造径规格钻孔径NPT NPS使用绞刀时不用绞刀时1/16 -27 6.1 6.25 6.351/8 -27 8.33 8.43 8.741/4 -18 10.72 11.13 11.133/8 -18 14.27 14.27 14.681/2 -14 17.48 17.86 18.263/4 -14 22.63 23.01 23.421 -11-1/2 28.58 28.98 29.361-1/4-11-1/2 37.31 37.69 38.11-1/2-11-1/2 43.66 44.04 44.452 -11-1/2 55.58 55.96 56.36英制螺纹滚造径规格滚造径W 3/16 - 24 4.08 - 4.05W 1/4 - 20 5.51 - 5.46W 5/16 - 18 7.01 - 6.95W 3/8 - 16 8.48 - 8.41W 7/16 - 14 9.92 - 9.85W 1/2 - 12 11.31 - 11.24W 9/16 -12 12.89 - 12.82规格滚造径M3.0×0.5 2.63 2.60M3.0×0.6 2.56 2.53M3.5×0.6 3.06 3.03M4.0×0.7 3.49 3.45M4.0×0.75 3.45 3.41M4.5×0.75 3.96 3.92M5.0×0.8 4.43 4.38M5.0×0.9 4.36 4.31M6.0×1.0 5.30 5.25M7.0×1.0 6.30 6.25M8.0×1.0 7.28 - 7.23M8.0×1.25 7.12 - 7.07M9.0×1.25 8.12 - 8.07M10×1.25 9.10 - 9.04M10×1.5 8.97 - 8.91M11×1.5 9.97 - 9.91M12×1.5 10.92 - 10.87M12×1.75 10.79 - 10.73 M14×2.0 12.63 - 12.56M16×2.0 14.63 - 14.56M18×2.5 16.31 - 16.23M20×2.5 18.31 - 18.23M22×2.5 20.31 - 20.23针车用螺纹规格(UNC) 滚造径SM 1/8 40 2.735 -2.688 SM 1/8 44 2.769 -2.722 SM 9/64 40 3.128 -3.083 SM 11/64 40 3.855 -3.805 SM 3/16 32 4.205 -4.155 SM 3/16 28 4.143 -4.093 SM 7/32 32 5.003 -4.955 SM 15/64 28 5.325 -4.955 SM 1/4 40 5.890 -5.735 SM 1/4 28 5.721 -5.366 SM 9/32 28 6.528 -6.648 SM 11/32 28 8.092 -8.432 SM 3/8 29 8.880 -8.015 SM 7/16 30 10.466 -10.401 SM 7/16 16 10.037 -9.967 SM 1/2 20 11.819 -11.749 SM 9/16 20 13.400 -13.425规格(UNC) 滚造径NO.5-40 2.70 - 2.67NO.6-32 2.95 - 2.91NO.8-32 3.60 - 3.57NO.10-24 4.09 - 4.05NO.12-24 4.75 - 4.701/4 -20 5.50 - 5.455/16 -18 6.98 - 6.933/8 -16 8.45 - 8.407/16 -14 9.89 - 9.831/2 -13 11.39 - 11.329/16 -12 12.87 - 12.80美制细螺纹规格(UNF) 滚造径NO.5-44 2.73 - 2.70NO.6-40 3.05 - 3.02NO.8-36 3.66 - 3.63NO.10-32 4.26 - 4.80NO.12-28 4.84 - 4.801/4 -28 5.72 - 5.685/16 -24 7.20 - 7.163/8 -24 8.79 - 8.747/16 -20 10.23 - 10.181/2 -20 11.82 - 11.76来源：直观学机械推荐阅读1.钢价惨烈下跌风暴即将来临?不要以为和你没关系2.世界名刀大全，简直太漂亮了免责声明：本文系网络转载，版权归原作者所有。

超全螺纹攻牙钻孔直径和滚造直径对照表

2.752
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)

p14-1 螺纹孔攻牙钻孔径和滚造径对照表

公制细螺纹
标准径 2级牙钻孔直径最大最小
公制迫牙丝攻钻孔径
规格 G4-G6 精度等级 G7-G8 G9 规格
公制迫牙丝攻钻孔径
精度等级 G4-G6 G7-G8 G9 规格
英制螺纹
钻孔径硬材软材
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 M3.0×0.6 M3.5×0.6 M4.0×0.7 M4.0×0.75 M4.5×0.75 M5.0×0.8 M5.0×0.9 M6.0×1.0 M7.0×1.0 M8.0×1.25 M9.0×1.25 M10×1.5 M11×1.5 M12×1.75 M14×2.0 M16×2.0 M18×2.5 M20×2.5 M22×2.5 M24×3.0 M27×3.0 M30×3.5
11.00 11.5 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
2.65 3.25 3.75 5.10 6.60 8.00 9.40 10.70 12.30 13.70 16.70 19.50 22.40 25.00 28.30

螺纹攻牙底孔孔径对照表

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。

螺纹孔径和滚造径对照表

M32×1.5 M33×3.0 M33×2.0 M33×1.5 M35×1.5 M36×3.0 M36×2.0 M36×1.5
30.50 30.00 31.00 31.50 33.50 33.00 34.00 34.50
30.676 30.252 31.210 31.376 33.676 33.252 34.210 34.676
英 W1/8 - 40 W5/32 - 32 W3/16 - 24 W1/4 - 20 W5/16 - 18 W3/8 - 16 W7/16 - 14 W1/2 - 12 W9/16 - 12 W5/8 - 11 W3/4 - 10 W7/8 - 9 W1 - 8 W1-1/8 - 7 W1-1/4 - 7
螺纹攻牙钻孔径和滚造径对照表
公
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 M3.0×0.6 M3.5×0.6 M4.0×0.7 M4.0×0.75 M4.5×0.75 M5.0×0.8 M5.0×0.9 M6.0×1.0 M7.0×1.0 M8.0×1.25 M9.0×1.25 M10×1.5 M11×1.5 M15 M22×2.5 M24×3.0 M27×3.0 M30×3.5
螺
纹
美
制
粗
标准径 1.55 1.80 2.10 2.30 2.60 2.80 3.40 3.90 4.50 5.10 6.60 8.00 9.40 10.80 12.20 13.60 16.20 19.50 22.20 25.00 28.20 30.80 34.00 39.50 45.20

螺纹孔径和滚造径对照表

0.75 0.85 0.95 1.10 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
ቤተ መጻሕፍቲ ባይዱ
M1.2×0.25
1.06 1.08
M1.4×0.3
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
M2.0×0.4
1.78 1.80
M2.2×0.45
1.95 1.98
M2.3×0.4
2.08 2.10
M2.5×0.45
2级牙钻孔径最大最小 0.821 0.783 0.921 0.883 1.021 0.983 1.221 0.183 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 61.88 6.550 64.00 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

螺丝攻牙对照表

30.210 29.835
30.676 30.376
30.252 29.752
31.210 30.835
31.676 31.376
33.676 33.376
33.252 32.752
34.210 33.835
34.676 34.376
--
--
螺絲攻牙鑽孔徑和滾造徑對照表
美制粗螺紋
美制細螺紋
規格(UNC)
美制特細螺紋
美制特細螺紋
規格(UNEF)
NO. 12 - 32 1/4 - 32 5/16 - 32 3/8 - 32
7/16 - 28 1/2 - 28
標準徑
4.70 5.60 7.10 8.70 10.20 11.80
2級牙鑽孔徑
最大
最小
4.826 4.623
5.690 5.486
7.264 7.087
17.958 17.678
21.133 20.853
24.308 24.028
--
--
螺絲攻牙鑽孔徑和滾造徑對照表
公制迫牙絲攻鑽孔徑
美制迫牙絲攻鑽孔徑
規格
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 M2.0×0.40 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 M5.0×0.8 M6.0×1.0 M7.0×1.0 M8.0×1.25 M10×1.5 M10×1.25 M12×1.75 M12×1.25
20.00 20.210 19.835
20.50 20.676 20.376

超全螺纹攻牙钻孔直径和滚造直径对照表,值得收藏!

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
16.670
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
39.50
39.827
38.964
2 -4-1/2
45.20
45.593
44.679
英制螺纹
规格
钻孔径
硬材
软材
W1/8 - 40
2.65
2.60
W5/32 - 32
3.25
3.20
W3/16 - 24
3.75
3.70
W1/4 - 20
11.938
11.709
9/16 -28
13.20
13.386
13.132
5/8 -24
14.80
14.986
14.732
3/4 -20
17.80
17.958
17.678
7/8 -20
21.00
21.133
20.853
1 -20
24.00
24.308
24.028
美制粗螺纹
规格(UNC)
标准径
1.40
1.421
1.383
M1.7×0.2
1.45
1.500
1.460
M1.8×0.2
1.60

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。

螺丝攻牙钻孔径和滚造径对照表

这是旧国标中有的标记，“Z”表示的是“圆锥螺纹”，“圆锥管螺纹”的表示是“ZG”。

“Z”和“ZG”的区别在于“Z”的牙型角是60°，而“ZG”的牙型角是55°。

其它后面的参数表示是一都是公称直径(螺纹用于管子孔径的近似值，不是管子的外径)，英制。

现行国标中淘汰了“圆锥螺纹”，即“Z”，现在的锥管螺纹全称是“用螺纹密封的锥管螺纹”，使用““Rc”两种表示方法，其中“Rc”表示内管螺纹，“R”表示外管螺纹。

至于后后面的1/4代表的尺寸，可以查阅机械零件手册，里面有的。

纹。

它后面的参数表示是一样的，封的锥管螺纹”，使用“R”和
纹。

螺丝攻牙钻孔经和滚造经对照表

6.364 8.388 11.174 14.658 18.263 23.663 29.822 38.339 44.232 55.844
5/16--24 3/8--24 7/16--20 1/2--20
美制粗螺纹
规格（UNC）
普通牙外径 NO.1-64（1.854） NO.2-56（2.184） NO.3-48（2.515） NO.4-40（2.2845） NO.5-40（3.175） NO.6-32（3.505） NO.8-32（4.166） NO.10-24（2.826） NO.12-24（5.846）
公制细螺纹
最小规格
M15X1.5 M15X1.0 M16X1.5 M16X1.0 M17X1.5 M17X1.0 M18X2.0 M18X1.5 M18X1.0 M20X2.0 M20X1.5 M20X1.0 M22X2.0 M22X1.5 M22X1.0 M24X2.0 M24X1.5 M24X1.0 M25X2.0 M25X1.5 M55X1.0 M26X1.5 M27X2.0 M27X1.5 M27X1.0 M28X2.0 M28X1.5 M28X1.0 M30X3.0 M30X2.0 M30X1.5 M30X1.0 M32X2.0 M32X1.5 M33X3.0 M33X2.0
针车用螺纹
标准径 0.75 0.85 0.95 1.1 1.25 1.35 1.45 1.6 1.75 1.9 2.1 2.2 2.5 2.4 2.9 3.3 3.25 3.8 4.2 4.1 5 6 6.8 7.8 8.5 9.5 10.3 12 14 15.5 17.5 19.5 21 24 26.5
2级牙钻孔径最大 0.785 0.785 0.985 1.142 1.321 1.421 1.521 1.679 1.836 1.979 2.138 2.238 2.599 2.44 3.01 3.422 3.326 3.878 4.334 4.17 5.153 6.153 6.912 7.912 8.676 9.676 10.441 12.21 14.21 15.744 17.744 19.744 21.252 24.252 26.771 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 2.28 2.85 3.242 3.106 3.688 4.134 3.93 4.917 5.917 6.647 7.647 8.376 9.376 10.106 11.835 13.835 15.294 17.294 19.294 20.725 23.752 26.211

螺丝攻牙钻孔径和滚造径对照表

螺丝攻牙钻孔径和滚造径对照表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级牙钻规格（UN标准2级牙钻最大最小最大最小M1.0×0.25 0.70.70.7NO.1-1.51.5 1.4 M1.1×0.25 0.80.80.8NO.2-1.81.8 1.6 M1.2×0.25 0.90.90.9NO.3-2.12.1 1.9 M1.4×0.3 1.1 1.1 1.0NO.4-2.32.3 2.1 M1.6×0.35 1.2 1.3 1.2NO.5-2.62.6 2.4 M1.7×0.35 1.3 1.4 1.3NO.6-2.82.8 2.6 M1.8×0.35 1.4 1.5 1.4NO8- 3.43.5 3.3 M2.0×0.4 1.6 1.6 1.5NO.1 3.93.9 3.6 M2.2×0.45 1.7 1.8 1.7NO.1 4.54.5 4.3 M2.3×0.4 1.9 1.9 1.81/4- 5.15.2 4.9 M2.5×0.45 2.1 2.1 2.05/16-6.66.7 6.4 M2.6×0.45 2.2 2.2 2.13/8-8.08.17.7 M3.0×0.5 2.5 2.5 2.47/16-9.49.59.1 M3.0×0.6 2.4 2.4 2.21/2-10.11.10. M3.5×0.6 2.9 3.0 2.89/16-12.12.11. M4.0×0.7 3.3 3.4 3.25/8-13.12.13. M4.0×0.75 3.2 3.3 3.13/4-16.18.16. M4.5×0.75 3.8 3.8 3.67/8-9 19.19.19. M5.0×0.8 4.2 4.3 4.1 1 22.22.21. M5.0×0.9 4.1 4.1 3.91-25.25.24. M6.0×1.0 5.0 5.1 4.91-28.28.27. M7.0×1.0 6.0 6.1 5.91-30.31.30. M8.0×1.25 6.8 6.9 6.61-34.34.33. M9.0×1.25 7.87.97.61-39.39.38. M10×1.5 8.58.68.32-4-45.45.44. M11×1.5 9.59.69.3M12×1.75 10.10.10.M14×2.0 12.12.11.M16×2.0 14.14.13.M18×2.5 15.15.15.M20×2.5 17.17.17.M22×2.5 19.19.19.M24×3.0 21.21.20.M27×3.0 24.24.23.M30×3.5 26.26.26.M16丝孔钻14。

螺丝攻牙钻孔径和滚造径对照表

3/8-24
标准径 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
2级牙钻孔径最大最小
1.305 1.182
1.612 1.474
1.912 1.756
2.197 2.025
2.458 2.271
2.740 2.551
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。
美制粗螺纹
规格(unc) 螺丝牙外径
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)
标准径
1.55 1.80 2.10 2.30 2.60 2.80
2级牙钻孔径最大最小
1.582 1.425 1.871 1.695 2.146 1.941 2.385 2.157 2.697 2.487 2.895 2.642
No.8-32(4.166) 3.40 3.530 3.302
M1.0×0.2 0.80 0.821 0.783
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 M2.3×0.40 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
12.20 12.446 11.989