各种螺丝攻牙钻孔径对照表

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。

螺纹种类依螺紋用途不同可分为：1.国际公制标准螺纹(International Metric Thread System)：我国国家标准CNS采用之螺纹。

牙顶为平面，易於车削，牙底则为圆弧形，以增加螺纹强度。

螺纹角为60度，规格以M表示。

公制螺纹可分粗牙及细牙二种。

表示法如M8x1.25。

(M：代号、8：公称直径、1.25：螺距)。

2.美国标准螺纹(American Standard Thread)：螺纹顶部与根部皆为平面，强度较佳。

螺纹角亦为60度，规格以每英寸有几牙表示。

此种螺纹可分为粗牙(NC)；细牙(NF)；特细牙(NEF)三级。

表示法如1/2-10NC。

(1/2：外径；10：每寸牙数；NC 代号)。

3.统一标准螺纹(Unified Thread)：由美国、英国、加拿大三国共同制订，为目前常用之英制螺纹。

螺纹角亦为60度，规格以每英寸有几牙表示。

此种螺纹可分为粗牙(UNC)；细牙(UNF)；特细牙(UNEF)。

表示法如1/2-10UNC。

(1/2：外径；10：每寸牙数；UNC代号)4.V形螺纹(Sharp V Thread)：顶部与根部均成尖状，强度较弱，亦坏不常使用。

螺纹角为60度。

5.惠式螺纹(Whitworth Thread)：英国国家标准采用之螺纹。

螺纹角为55度，表示符号为”W”。

适用於滚压法制造。

表示法如W1/2-10。

(1/2：外径；10：每寸牙数；W代号)。

6.圆螺纹(Knuckle Thread)：为德国DIN所定之标准螺纹。

适用於灯泡、橡皮管之连接。

表示符号为”Rd”。

7.管用螺纹(Pipe Thread)：为防止泄漏用的螺纹，经常用於气体或液体之管件连结。

螺纹角为55度，可分为直管螺纹代号为”P.S.、N.P.S.”和斜管螺纹代号为”N.P.T.”，其锥度为1：16，即每尺3/4寸。

8.方螺纹(Square Thread)：传动效率大，仅次於滚珠螺纹，而磨损後无法用螺帽调整，为其缺点。

螺纹下孔径表公制粗牙螺纹JIS B 0209-1982(單位：mm)註(1)M1.4以下等級：5H、M1.6以上等級：6H(2)基於JIS B 0209-1982標準螺纹下孔径表公制細牙螺纹JIS B 0211-1982(單位：mm)螺纹下孔径表公制細牙螺纹JIS B 0211-1982(單位：mm)註(1)等級：6H(2)基於JIS B 0211-1982標準螺纹下孔径表美制粗牙螺纹(單位：mm)螺纹下孔径表美制細牙螺纹(單位：mm)螺纹下孔径表英制粗牙螺纹(單位：mm)螺纹下孔径表英制管用螺纹(單位：mm)螺纹下孔径表英制平行管用螺纹PF(G)(單位：mm)使用粗線左側數據作為攻絲前的底孔直径，可加工符合JIS B 0202的A級或B級的內螺纹小径。

美制斜行管用螺纹 (NPT?NPS)(單位：mm)上述钻头直径來源於美制管用螺纹ANSI／ASME B1.20.1—1983 Pipe Threads, General Purpose (Inch)標準。

螺纹下孔径表美制管用耐密斜行螺纹(NPTF?NPSF)(單位：mm)上述钻头直径來源於美制管用耐密斜行螺纹ANSI B1.20.3—1957 Dryseal Pipe Threads (Inch)標準。

螺纹下孔径表(無屑絲攻用)公制螺纹(NRT)(單位：mm)螺纹下孔径表(無屑絲攻用)美制粗牙螺纹(NRT)(單位：mm)螺纹下孔径表(無屑絲攻用)美制細牙螺纹(NRT)(單位：mm)英制管用平行螺纹(NRT)(單位：mm)螺纹下孔径表(無屑絲攻用)公制螺纹(HRT)(單位：mm)螺纹下孔径表(護套螺纹用)公制粗牙螺纹 HL-NRT(單位：mm)螺纹下孔径表(護套螺纹用)公制粗牙螺纹(單位：mm)公制細牙螺纹(單位：mm)螺纹下孔径表(護套螺纹用)美制粗牙螺纹(單位：mm)美制細牙螺纹(單位：mm)。

标准公制螺母攻牙要钻个小于螺纹大径的孔来攻牙。

这个孔的大小就是螺纹小径到螺纹中径。

如何确认孔径大小就要参照对照表啦,一起来看看吧！螺丝攻牙钻孔径对照表- 14 (3.175) 1- 11 30.20 30.472 30.111NO.6 - 32(3.505)2.80 2.895 2.6421-1/4 -11 38.80 39.133 38.771NO.8 - 32(4.166)3.40 3.530 3.3021-1/2 -11 44.70 45.026 44.664NO.10 -24(4.826)3.90 3.962 3.6832- 11 56.50 56.837 56.475NO.12 -24(5.486)4.50 4.597 4.3441/4 - 20 5.10 5.257 4.979英制管螺纹5/16 - 18 6.60 6.731 6.401 PF规格(新规格G) 标准径最大最小3/8 - 16 8.00 8.153 7.7987/16 - 14 9.40 9.550 9.1441/16 -286.70 6.843 6.561 1/2 - 13 10.90 11.023 10.592 1/8- 288.70 8.848 8.566 9/16 - 12 12.20 12.446 11.989 1/4- 1911.70 11.89 11.445 5/8 - 11 13.60 13.868 13.386 3/8- 1915.20 15.395 14.950 3/4 - 10 16.60 16.840 16.3071/2 - 14 19.00 19.172 18.6317/8- 919.60 19.761 19.177中之毋螺牙径1/16 -6.10 6.20 6.244 6.384281/8 -8.10 8.20 8.249 8.388281/4 -10.70 11.00 10.962 11.174193/8 -14.20 14.50 14.448 14.658191/2 -17.60 18.00 17.979 18.263143/4 -23.00 23.50 23.378 23.66314129.00 29.50 29.459 29.822- 111-1/4 -37.50 38.00 37.976 38.339111-1/2 -43.40 44.00 43.869 44.23211254.90 55.50 55.412 55.844- 11美制管螺纹针车用螺纹规格钻孔径规格标准径最大最小N P TN P SSM1/16 - 80 1.25 1.281 1.211使用绞刀时不用绞刀时SM5/64 - 64 1.55 1.593 1.5131/16 -275.946.15 6.35 SM3/32 - 56 1.90 1.936 1.841 1/8- 278.33 8.43 8.74 SM3/32 -100 2.10 2.156 2.081 1/4- 1810.72 11.13 11.13 SM1/8 - 32 2.30 2.393 2.233 3/8- 1814.27 14.27 14.68 SM1/8 - 40 2.50 2.551 2.421 1/2- 1417.48 17.86 18.26 SM1/8 - 44 2.50 2.605 2.485 3/4-1422.63 23.01 23.42 SM1/8 - 48 2.60 2.657 2.5471-11-1/228.58 28.98 29.36 SM9/64 - 32 2.70 2.79 2.6301-1/4 -11-1/237.31 37.69 38.10 SM9/64 - 40 2.90 2.948 2.8181-1/2-11-1/2 43.26 43.66 44.45SM11/64-323.50 3.584 3.4242-11-1/2 55.17 55.58 56.36SM11/64-403.70 3.742 3.612SM3/16 - 24 3.60 3.658 3.498英制螺纹SM3/16 - 28 3.80 3.844 3.684 规格钻孔径SM3/16 - 32 3.90 3.98 3.820 硬材软材SM3/16 - 40 4.05 4.138 4.008 W 1/8- 402.65 2.60 SM7/32 - 32 4.70 4.774 4.614 W 5/32- 323.25 3.20 SM15/64 -28 5.00 5.0554.875 W 3/16- 243.75 3.70 SM1/4 - 24 5.20 5.266 5.086 W 1/4- 205.10 5.00 SM1/4 - 28 5.40 5.452 5.272 W 5/16- 186.60 6.50 SM1/4 - 40 5.60 5.726 5.596 W 3/8- 168.00 7.90 SM9/32 - 20 5.70 5.824 5.634 W 7/16- 149.40 9.30 SM9/32 - 28 6.20 6.256 6.066 W 1/2- 1210.70 10.50 SM5/16 - 18 6.30 6.444 6.254 W 9/16- 1212.30 12.00 SM5/16 - 24 6.80 6.864 6.674W 5/813.70 13.50 SM5/16 - 28 6.90 7.05 6.860 - 11W 3/416.70 16.50 SM11/32 -28 7.70 7.843 7.653 - 10W 7/819.50 19.30 SM3/8 - 18 7.90 8.053 7.843 - 9W 122.40 22.00 SM3/8 - 28 8.50 8.637 8.447 - 825.00 24.00 SM7/16 - 16 9.30 9.44 9.220 W1-1/8- 728.30 28.00 SM7/16 - 28 10.10 10.224 10.034 W1-1/4- 7W 5/166.60 6.50 SM1/2 - 12 10.30 10.42 10.180 - 18W 3/88.00 7.90 SM1/2 - 20 11.30 11.41 11.190 - 16W 7/169.40 9.30 SM1/2 - 28 11.70 11.812 11.622 - 14W 1/210.70 10.50 SM9/16 - 20 12.90 13.018 12.778 - 12W 9/16 12.30 12.00- 12W 5/8- 1113.70 13.50W 3/4- 1016.70 16.50W 7/8- 919.50 19.30W 1- 822.40 22.00W1-1/8- 725.00 24.00W1-1/4- 728.30 28.00公制迫牙丝攻钻孔径美制迫牙丝攻钻孔径规格精度最大最小规格精度最大最小M1.0×0.25 G4 0.92 0.891-64UNCG5 1.76 1.68M1.2×0.25 G4 1.12 1.092-56G4 2.04 1.96M1.4×0.30 G4 1.3 1.263-48G4 2.35 2.250.80 -80UNC M6.0×1.0 G7 5.59 5.491-72G5 1.77 11.7M7.0×1.0 G7 6.59 6.492-64G4 2.06 1.98M8.0×1.25 G7 7.49 7.363-56G4 2.37 2.29M10×1.50 G7 9.34 9.224-48G5 2.68 2.59M10×1.25 G7 9.49 9.355-44G5 2.99 2.9M12×1.75 G8 11.23 11.096-40G5 3.29 3.19M12×1.25 G9 11.5 11.368-36G5 3.91 3.8110 -32 G6 4.53 4.44英制电器螺纹12 -28 G6 5.13 5.03 规格钻孔径1/4" -28 G7 6 5.91 2BA 4.0-4.2 5/16" -24 G7 7.53 7.42 3BA 3.4-3.6 3/8" -24 G7 9.1 8.99 4BA 3.0-3.2 7/16" -20 G8 10.62 10.48 5BA 2.7-2.8 1/2" -20 G8 12.2 12.06 6BA 2.4-2.5扩展资料：攻丝方法：攻丝是用一定的扭矩将丝锥旋入要钻的底孔中加工出内螺纹。

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。

机加工螺纹攻牙钻孔直径对照表螺纹攻牙钻孔直径对照表：公制粗螺纹规格标准径2级牙钻孔径最大最小M1.0×0.250.75 0.785 0.729 M1.1×0.250.85 0.885 0.829 M1.2×0.250.95 0.985 0.929 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 2.44 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 M9.0×1.257.80 7.912 7.647 M10×1.58.50 8.676 8.376 M11×1.59.50 9.676 9.376 M12×1.7510.30 10.441 10.106 M14×2.012.00 12.210 11.735 M16×2.014.00 14.210 13.835 M18×2.515.50 15.744 15.294 M20×2.517.50 17.744 17.294M22×2.519.50 19.744 19.294 M24×3.021.00 21.252 20.752 M27×3.024.00 24.252 23.752 M30×3.526.50 26.771 26.211 公制细螺纹规格标准径2级牙钻孔径最大最小M1.0×0.20.80 0.821 0.783 M1.1×0.20.90 0.921 0.883 M1.2×0.2 1.00 1.021 0.983 M1.4×0.2 1.20 1.221 0.183 M1.6×0.2 1.40 1.421 1.383 M1.7×0.2 1.45 1.500 1.460 M1.8×0.2 1.60 1.621 1.583 M2.0×0.25 1.75 1.785 1.729 M2.2×0.25 1.95 1.985 1.929 M2.3×0.25 2.05 2.061 2.001 M2.5×0.35 2.20 2.221 2.121 M2.6×0.35 2.20 2.246 2.186 M3.0×0.35 2.70 2.721 2.621 M3.5×0.35 3.20 3.221 3.121 M4.0×0.5 3.50 3.599 3.459 M4.5×0.5 4.00 4.099 3.959 M5×0.5 4.50 4.599 4.459 M5.5×0.5 5.00 5.099 4.959 M6.0×0.75 5.30 5.378 5.188 M6.0×0.5 5.50 5.550 5.400 M7.0×0.75 6.30 6.378 61.88 M7.0×0.5 6.50 6.550 64.00 M8.0×1.07.00 7.153 6.917 M8.0×0.757.30 7.378 7.188 M8×0.57.50 7.520 7.400 M9×1.08.00 8.153 7.917 M9×0.758.30 8.378 8.188 M10×1.258.80 8.912 8.647 M10×1.09.00 9.153 8.917 M10×0.759.30 9.378 9.188M11×1.010.00 10.153 9.917 M11×0.7510.30 10.378 10.188 M11×1.510.50 10.676 10.376 M12×1.2510.80 10.912 10.647 公制细螺纹规格标准径2级牙钻孔径最大最小M12×1.011.00 11.153 10.917 M12×0.511.50 11.520 11.4 M14×1.512.50 12.676 12.376 M14×1.013.00 13.153 12.917 M15×1.513.50 13.676 13.376 M15×1.014.00 14.153 13.917 M16×1.514.50 14.676 14.376 M16×1.015.00 15.153 14.917 M17×1.515.50 15.676 15.376 M17×1.016.00 16.153 15.917 M18×2.016.00 16.210 15.835 M18×1.516.50 16.670 16.376 M18×1.017.00 17.153 16.917 M20×2.018.00 18.210 17.835 M20×1.518.50 18.676 18.376 M20×1.019.00 19.153 18.917 M20×2.020.00 20.210 19.835 M22×1.520.50 20.676 20.376 M22×1.021.00 21.153 20.917 M24×2.022.00 22.210 21.835 M24×1.522.50 22.676 22.376 M24×1.023.00 23.153 22.917 M25×2.023.00 23.210 22.835 M25×1.523.50 23.676 23.376 M25×1.024.00 24.153 23.917 M26×1.524.50 24.676 24.376 M27×2.025.00 25.210 24.835 M27×1.525.50 25.676 25.376 M27×1.026.00 26.153 25.917M28×1.526.50 26.676 26.376 M28×1.027.00 27.153 26.917 M30×3.027.00 27.252 26.752 M30×2.028.00 28.210 27.835 M30×1.528.50 28.676 28.376 M30×1.029.00 29.153 28.917 M32×2.030.00 30.210 29.835 M32×1.530.50 30.676 30.376 M33×3.030.00 30.252 29.752 M33×2.031.00 31.210 30.835 M33×1.531.50 31.376 31.376 M35×1.533.50 33.676 33.376 M36×3.033.00 33.252 32.752 M36×2.034.00 34.210 33.835 M36×1.534.50 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 5.360 5/16 -24 6.90 7.035 6.782 3/8 -24 8.50 8.636 8.382 7/16 -20 9.90 10.033 9.729 1/2 -20 11.50 11.607 11.329 9/16 -18 12.90 13.081 12.751 5/8 -18 14.50 14.681 14.3513/4 -16 17.50 14.678 17.323 7/8 -14 20.50 20.675 20.270 1 -12 23.20 23.571 23.114 1-1/8 -12 26.50 26.746 26.289 1-1/4 -12 29.50 29.921 29.464 1-3/8 -12 32.80 33.096 32.464 1-1/2 -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 RH9M1.0×0.250.86 0.88 -M1.1×0.250.96 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 3.69 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 M8.0×1.257.31 7.38 7.44 M10×1.59.18 9.25 9.32 M10×1.259.31 9.38 9.44 M12×1.7511.04 11.12 11.21 M12×1.2511.31 11.38 11.44 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 5.486 5/16 -32 7.10 7.264 7.087 3/8 -32 8.70 8.865 8.661 7/16 -28 10.20 10.338 10.135 1/2 -28 11.80 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 1.425 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 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 4.979 5/16 -18 6.60 6.731 6.401 3/8 -16 8.00 8.153 7.987 7/16 -14 9.40 9.500 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 16.20 16.840 16.307 7/8 -9 19.50 19.761 19.177 1 -8 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 38.9642 -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 6.384 PT1/8 -28 8.10 8.2 8.249 8.388 PT1/4 -19 10.70 11 10.962 11.174 PT3/8 -19 14.20 14.5 14.448 14.658 PT1/2 -14 17.60 18 17.979 18.263 PT3/4 -14 23.00 23.5 23.378 23.663 Pt1 -11 29.00 29.5 29.459 29.822 PT1-1/4 -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M3.0×0.6 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 6.25M8.0×1.07.28 - 7.23M8.0×1.257.12 - 7.07M9.0×1.258.12 - 8.07M10×1.259.10 - 9.04M10×1.58.97 - 8.91M11×1.59.97 - 9.91M12×1.510.92 - 10.87 M12×1.7510.79 - 10.73 M14×2.012.63 - 12.56 M16×2.014.63 - 14.56 M18×2.516.31 - 16.23 M20×2.518.31 - 18.23 M22×2.520.31 - 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 -9.967SM 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 - 2.67 NO.6-32 2.95 - 2.91 NO.8-32 3.60 - 3.57 NO.10-24 4.09 - 4.05 NO.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 - 11.32 9/16 -12 12.87 - 12.80 美制细螺纹规格(UNF) 滚造径NO.5-44 2.73 - 2.70 NO.6-40 3.05 - 3.02 NO.8-36 3.66 - 3.63 NO.10-32 4.26 - 4.80 NO.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 - 10.18 1/2 -20 11.82 - 11.76。

最大最小最大最小G4-G6G7-G8G9G4-G6G7-G8硬 材软 材M1.0*0.250.750.7850.729M12*1.011.0011.15310.917M1.0*0.250.860.88No.2-56UNC 1.94 2.65 2.60M1.1*0.250.850.8850.829M12*0.511.5011.52011.400M1.1*0.250.960.98No.3-48 2.23 3.25 3.20M1.2*0.250.950.9850.929M14*1.512.5012.67612.376M1.2*0.25 1.06 1.08No.4-40 2.50 3.75 3.70M1.4*0.31.10 1.142 1.075M14*1.013.0013.15312.917M1.4*0.3 1.24 1.25No.5-40 2.83 5.10 5.00M1.6*0.351.25 1.321 1.221M15*1.513.5013.67613.376M1.6*0.35 1.41 1.43No.6-32 3.07 6.60 6.50M1.7*0.351.35 1.421 1.321M15*1.014.0014.15313.917M1.7*0.35 1.51 1.53No.8-32 3.73 3.778.007.90M1.8*0.351.45 1.521 1.421M16*1.514.5014.67614.376M1.8*0.35 1.61 1.63No.10-24 4.24 4.309.409.30M2.0*0.41.60 1.679 1.567M16*1.015.0015.15314.917M2*0.4 1.78 1.80No.12-24 4.90 4.9610.7010.50M2.2*0.451.75 1.838 1.713M17*1.515.5015.67615.376M2.2*0.45 1.95 1.981/4 -20 5.7212.3012.00M2.3*0.41.90 1.979 1.867M17*1.016.0016.15315.917M2.3*0.4 2.08 2.105/16 -187.2413.7013.50M2.5*0.452.10 2.138 2.013M18*2.016.0016.21015.835M2.5*0.45 2.25 2.283/8 -168.7416.7016.50M2.6*0.452.20 2.238 2.113M18*1.516.5016.67616.376M2.6*0.45 2.35 2.387/16 -1410.2019.5019.30M3.0*0.52.50 2.599 2.459M18*1.017.0017.15316.917M3.0*0.5 2.73 2.751/2 -1311.2722.4022.00M3.0*0.62.40 2.440 2.280M20*2.018.0018.21017.835M3.5*0.6 3.17 3.20No.2-64UNF 1.9725.0024.80M3.5*0.62.903.010 2.850M20*1.518.5018.67618.376M4.0*0.7 3.62 3.65 3.69No.3-56 2.2728.3028.00M4.0*0.73.30 3.422 3.242M20*1.019.0019.15318.917M5.0*0.84.56 4.60 4.64No.4-48 2.56M4.0*0.753.25 3.326 3.106M22*2.020.0020.21019.835M6.0*1.0 5.45 5.50 5.55No.5-44 2.86M4.5*0.753.80 3.878 3.688M22*1.520.5020.67620.376M7.0*1.0 6.45 6.50 6.55No.6-40 3.16M5.0*0.84.20 4.334 4.134M22*1.021.0021.15320.917M8.0*1.257.317.387.44No.8-36 3.78M5.0*0.94.10 4.170 3.930M24*2.022.0022.21021.835M10*1.59.189.259.32No.10-32 4.39 4.43M6.0*1.05.00 5.153 4.917M24*1.522.5022.67622.376M10*1.259.319.389.44No.12-28 4.99 5.04SM1/8 -40M7.0*1.06.00 6.153 5.917M24*1.023.0023.15322.917M12*1.7511.0411.1211.211/4 -28 5.85 5.90SM1/8 -44M8.0*1.256.80 6.912 6.647M25*2.023.0023.21022.835M12*1.2511.3111.3811.445/16 -247.367.41SM9/64 -40M9.0*1.257.807.9127.647M25*1.523.5023.67623.3763/8 -249.00SM11/64-40M10*1.58.508.6768.376M25*1.024.0024.15323.9177/16 -2010.48SM3/16 -32M11*1.59.509.6769.376M26*1.524.5024.67624.3761/2 -2012.07SM3/16 -28M12*1.7510.3010.44110.106M27*2.025.0025.21024.835SM7/32 -32M14*2.012.0012.21011.835M27*1.525.5025.67625.376SM15/64-28M16*2.014.0014.21013.835M27*1.026.0026.15325.917SM1/4 -40M18*2.515.5015.74415.294M28*2.026.0026.21025.835SM1/4 -28M20*2.517.5017.74417.294M28*1.526.5026.67626.376SM9/32 -28M22*2.519.5019.74419.294M28*1.027.0027.15326.917规格最大SM11/32-28M24*3.021.0021.25220.752M30*3.027.0027.25226.752(UNC)最大最小PS 1/16 - 28 6.50 6.632SM3/8 -28M27*3.024.0024.25223.752M30*2.028.0028.21027.835 (螺丝牙外径)PS 1/8 - 288.508.637SM7/16 -28M30*3.526.5026.77126.211M30*1.528.5028.67628.376No.1-64(1.854) 1.55 1.582 1.425PS 1/4 - 1911.4011.549M30*1.029.0029.15328.917No.2-56(2.184) 1.80 1.871 1.695PS 3/8 - 1915.0015.054M32*2.030.0030.21029.835No.3-48(2.515) 2.10 2.146 1.941PS 1/2 - 1418.5018.773M32*1.530.5030.67630.376No.4-40(2.845) 2.30 2.385 2.157PS 3/4 - 1424.0024.259M33*3.030.0030.25229.752No.5-40(3.175) 2.60 2.697 2.487PS 1 - 1130.2030.471M33*2.031.0031.21030.835No.6-32(3.505) 2.80 2.895 2.642PS 1-1/4 - 1138.8039.132最大最小M33*1.531.5031.67631.376No.8-32(4.166) 3.40 3.53 3.302PS 1-1/2 - 1144.8045.025M1.0*0.20.800.8210.783M35*1.533.5033.67633.376No.10-24(4.826) 3.90 3.962 3.683PS 2 - 1156.5056.836M1.1*0.20.900.9210.883M36*3.033.0033.25232.752No.12-24(5.486) 4.50 4.597 4.344M1.2*0.2 1.00 1.0210.983M36*2.034.0034.21033.8351/4 - 20 5.10 5.257 4.979M1.4*0.2 1.20 1.221 1.183M36*1.534.5034.67634.3765/16 - 18 6.60 6.731 6.401M1.6*0.2 1.40 1.421 1.3833/8 - 168.008.1537.798M1.7*0.2 1.45 1.500 1.4607/16 - 149.409.559.144M1.8*0.2 1.60 1.621 1.5831/2 - 1310.8011.02310.592使用绞刀时不用绞刀时M2.0*0.25 1.75 1.785 1.7299/16 - 1212.2012.44611.989PT 1/16 -28 6.10 6.20 6.244 6.384M2.2*0.25 1.95 1.985 1.929规格5/8 - 1113.6012.86813.386PT 1/8 -288.108.208.4298.388M2.3*0.25 2.05 2.061 2.001(UNF)最大最小3/4 - 1016.5018.8416.307PT 1/4 -1910.7011.0010.96211.174M2.5*0.35 2.20 2.221 2.1217/8 - 919.5019.76119.177PT 3/8 -1914.2014.5014.44814.658M2.6*0.35 2.20 2.246 2.186No.0-80(1.524) 1.25 1.305 1.182 1 - 822.2022.60621.971PT 1/2 -1417.6018.0017.97918.263M3.0*0.35 2.70 2.721 2.621No.1-72(1.854) 1.55 1.612 1.4741-1/8 - 725.0025.34924.638PT 3/4 -1423.0023.5023.37823.663M3.5*0.35 3.20 3.221 3.121No.2-64(2.184) 1.85 1.912 1.7561-1/4 - 728.2028.52427.813PT 1 -1129.0029.5029.45929.822M4.0*0.5 3.50 3.599 3.459No.3-56(2.515) 2.10 2.197 2.0251-3/8 - 630.8031.11530.353PT 1-1/4 -1137.5038.0037.97638.339M4.5*0.5 4.00 4.099 3.959No.4-48(2.845) 2.40 2.458 2.2711-1/2 - 634.0034.2933.528PT 1-1/2 -1143.4044.0043.86944.232M5.0*0.5 4.50 4.599 4.459No.5-44(3.175) 2.70 2.74 2.5511-3/4 - 539.5039.82738.964PT 2 -1154.9055.5055.41255.844M5.5*0.55.00 5.099 4.959No.6-40(3.505) 2.90 3.022 2.82 2 - 4-1/245.2045.59344.679M6.0*0.755.30 5.378 5.188No.8-36(4.166) 3.50 3.606 3.404M6.0*0.55.50 5.550 5.400No.10-32(4.826) 4.10 4.165 3.963M7.0*0.756.30 6.378 6.188No.12-28(5.846) 4.60 4.724 4.496M7.0*0.56.50 6.550 6.4001/4 - 28 5.50 5.588 5.36M8.0*1.07.007.153 6.9175/16 - 24 6.907.035 6.782规格M8.0*0.757.307.3787.1883/8 - 248.508.6368.382(UNEF)最大最小使用绞刀时不用绞刀时M8.0*0.57.507.5207.4007/16 - 209.9010.0339.729No.12 - 32 4.70 4.826 4.6231/16 - 27 6.10 6.25M9.0*1.08.008.1537.9171/2 - 2011.5011.60711.3291/4 - 32 5.60 5.69 5.4861/8 -278.338.43M9.0*0.758.308.3788.1889/16 - 1812.9013.08112.7515/16 - 327.107.2647.0871/4 -1810.7211.13M10*1.258.808.9128.4675/8 - 1814.5014.68114.3513/8 - 328.708.8658.6613/8 -1814.2714.27M10*1.09.009.1538.9173/4 - 1617.5017.67817.3237/16 - 2810.2010.33810.1351/2 -1417.4817.86M10*0.759.309.3789.1887/8 - 1420.5020.67520.271/2 - 2811.8011.93811.7093/4 -1422.6323.01M10*0.59.509.5209.400 1 - 1223.2023.57123.1149/16 - 2413.2013.38613.132 1 -11-1/228.5828.98M11*1.010.0010.1539.9171-1/8 - 1226.5026.74626.2895/8 - 2414.8014.98614.7321-1/4 -11-1/237.3137.69M11*0.7510.3010.37810.1881-1/4 - 1229.5029.92129.4643/4 - 2017.8017.95817.6781-1/2 -11-1/243.6644.04M12*1.510.5010.67610.3761-3/8 - 1232.8033.09632.6397/8 - 2021.0021.13320.853 2 -11-1/255.5855.96M12*1.2510.8010.91210.6471-1/2 - 1236.0036.27135.814 1 - 2024.0024.30824.028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。