YAMAWA无沟丝攻下孔径清表
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。
螺纹下孔径表(无屑丝攻用)
9
15.14 ~15.25 (100~80)
7
15.11 ~15.17 (100~90)
3/4 -16
10
18.22 ~18.32 (100~85)
7
18.18 ~18.25 (100~90)
7/8 -14
11
21.27 ~21.38 (100~85)
8
21.23 ~21.27 (100~95)
6-32
5
3.09 ~3.17 (100~75)
3
3.06 ~3.14 (100~75)
8-32
6
3.75 ~3.83 (100~75)
4
3.74 ~3.82 (100~75)
10-24
6
4.26 ~4.35 (100~80)
4
4.24 ~4.32 (100~80)
12-24
6
4.92 ~5.01 (100~80)
－
1.858~1.887 (100~80)
2.3×0.4
－
2.07 ~2.12 (100~80)
4
2.07 ~2.13 (100~75)
2.5×0.45
3
2.24 ~2.30 (100~80)
5
2.24 ~2.31 (100~75)
2.6×0.45
－
2.34 ~2.40 (100~80)
5
2.34 ~2.41 (100~75)
2
1.97 ~2.03 (100~65)
3-56
4
2.29 ~2.35 (100~65)
3
2.28 ~2.34 (100~65)
4-48
4
2.57 ~2.64 (100~70)
公制及美制螺纹钻孔及滚丝径查询
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
G4-G6
G7-G8
G9
M1.0×0.25
0.86
8
－
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
【精品】螺丝攻牙钻孔径和滚丝径对照表(可编辑
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
32.752
M36×2.0
34.00
34.210
33.835
M36×1.5
34.50
34.676
34.376
签名档：
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
G9
M1.0×0.25
0.86
0.88
－
NO.2-56UNC
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
14.50
14.681
14.351
M5.5×0.5
5.00
5.099
4.959
3/4-16
17.50
攻牙底孔参数
攻牙底孔的使用参数表一、螺紋下孔徑表1、公制粗牙螺紋JIS B 0209-1982(單位：mm)螺纹尺寸钻头直径螺纹下孔徑內螺紋小徑最小直径最大直径M 1 ×0.25 0.75 0.78 (80%) 0.729 0.7851.1 ×0.25 0.85 0.88 (80%) 0.829 0.8851.2 ×0.25 0.95 0.98 (80%) 0.929 0.9851.4 ×0.3 1.1 1.14 (80%) 1.075 1.1421.6 ×0.35 1.25 1.32 (75%) 1.221 1.3211.8 ×0.35 1.45 1.52 (75%) 1.421 1.5212 ×0.4 1.6 1.65 (80%) 1.567 1.6792.2 ×0.45 1.75 1.83 (75%) 1.713 1.8382.5 ×0.45 2.1 2.13 (75%) 2.013 2.1383 ×0.5 2.5 2.59 (75%) 2.459 2.5993.5 ×0.6 2.9 3.01 (75%) 2.850 3.0104 ×0.7 3.3 3.39 (80%) 3.242 3.4224.5 ×0.75 3.8 3.85 (80%) 3.688 3.8785 ×0.8 4.2 4.31 (80%) 4.134 4.3346 × 1 5 5.13 (80%) 4.917 5.1537 × 1 6 6.13 (80%) 5.917 6.1538 × 1.25 6.8 6.85 (85%) 6.647 6.9129 × 1.25 7.8 7.85 (85%) 7.647 7.91210 × 1.5 8.5 8.62 (85%) 8.376 8.67611 × 1.5 9.5 9.62 (85%) 9.376 9.67612 × 1.75 10.3 10.40 (85%) 10.106 10.44114 × 2 12 12.2 (85%) 11.835 12.21016 × 2 14 14.2 (85%) 13.835 14.21018 × 2.5 15.5 15.7 (85%) 15.294 15.74420 × 2.5 17.5 17.7 (85%) 17.294 17.74422 × 2.5 19.5 19.2 (85%) 19.294 19.74424 × 3 21 21.2 (85%) 20.752 21.25227 × 3 24 24.2 (85%) 23.752 24.25230 × 3.5 26.5 26.6 (90%) 26.211 26.77133 × 3.5 29.5 29.6 (90%) 29.211 29.77136 × 4 32 32.1 (90%) 31.670 32.27039 × 4 35 35.1 (90%) 34.670 35.27042 × 4.5 37.5 37.6 (90%) 37.129 37.79945 × 4.5 40.5 40.6 (90%) 40.129 40.79948 × 5 43 43.1 (90%) 42.587 43.297 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2、公制細牙螺紋-01 JIS B 0211-1982(單位：mm)螺纹尺寸钻头直径螺纹下孔徑內螺紋小徑最小直径最大直径M 2.5 ×0.35 2.2 2.22 (75%) 2.121 2.2213 ×0.35 2.7 2.72 (75%) 2.621 2.7213.5 ×0.35 3.2 3.22 (75%) 3.121 3.2214 ×0.5 3.5 3.59 (75%) 3.459 3.5994.5 ×0.5 4 4.09 (75%) 3.959 4.0995 ×0.5 4.5 4.59 (75%) 4.459 4.5995.5 ×0.5 5 5.09 (75%) 4.959 5.0996 ×0.75 5.3 5.35 (80%) 5.188 5.3787 ×0.75 6.3 6.35 (80%) 6.188 6.3788 × 1 7 7.13 (80%) 6.917 7.1538 ×0.75 7.3 7.35 (80%) 7.188 7.3789 × 1 8 8.13 (80%) 7.917 8.1539 ×0.75 8.3 8.35 (80%) 8.188 8.37810 × 1.25 8.8 8.85 (85%) 8.647 8.91210 × 1 9 9.13 (80%) 8.917 9.15310 ×0.75 9.3 9.35 (80%) 9.188 9.37811 × 1 10 10.13 (80%) 9.917 10.15311 ×0.75 10.3 10.35 (80%) 10.188 10.37812 × 1.5 10.5 10.62 (85%) 10.376 10.67612 × 1.25 10.8 10.85 (85%) 10.647 10.91212 × 1 11 11.13 (80%) 10.917 11.15314 × 1.5 12.5 12.62 (85%) 12.376 12.67614 × 1 13 13.13 (80%) 12.917 13.15315 × 1.5 13.5 13.62 (85%) 13.376 13.67615 × 1 14 14.13 (80%) 13.917 14.15316 × 1.5 14.5 14.62 (85%) 14.376 14.67616 × 1 15 15.13 (80%) 14.917 15.15317 × 1.5 15.5 15.62 (85%) 15.376 15.67617 × 1 16 16.13 (80%) 15.917 16.15318 × 2 16 16.2 (85%) 15.835 16.21018 × 1.5 16.5 16.62 (85%) 16.376 16.67618 × 1 17 17.13 (80%) 16.917 17.15320 × 2 18 18.2 (85%) 17.835 18.21020 × 1.5 18.5 18.62 (85%) 18.376 18.67620 × 1 19 19.13 (80%) 18.917 19.15322 × 2 20 20.2 (85%) 19.835 20.21022 × 1.5 20.5 20.62 (85%) 20.376 20.67622 × 1 21 21.13 (80%) 20.917 21.15324 × 2 22 22.2 (85%) 21.835 22.21024 × 1.5 22.5 22.62 (85%) 22.376 22.67624 × 1 23 23.13 (80%) 22.917 23.15325 × 2 23 23.2 (85%) 22.835 23.21025 × 1.5 23.5 23.62 (85%) 23.376 23.67625 × 1 24 24.13 (80%) 23.917 24.153公制細牙螺紋-02 JIS B 0211-1982(單位：mm)螺纹尺寸钻头直径螺纹下孔徑內螺紋小徑最小直径最大直径M 26 × 1.5 24.5 24.62 (85%) 24.376 24.676 27 × 2 25 25.2 (85%) 24.835 25.210 27 × 1.5 25.5 25.62 (85%) 25.376 25.67627 × 1 26 26.13 (80%) 25.917 26.15328 × 2 26 26.2 (85%) 25.835 26.210 28 × 1.5 26.5 26.62 (85%) 26.376 26.676 28 × 1 27 27.13 (80%) 26.917 27.15330 × 3 27 27.2 (85%) 26.752 27.252 30 × 2 28 28.2 (85%) 27.835 28.210 30 × 1.5 28.5 28.62 (85%) 28.376 28.676 30 × 1 29 29.13 (80%) 28.917 29.153 32 × 2 30 30.2 (85%) 29.835 30.21032 × 1.5 30.5 30.62 (85%) 30.376 30.67633 × 3 30 30.2 (85%) 29.752 30.252 33 × 2 31 31.2 (85%) 30.835 31.210 33 × 1.5 31.5 31.62 (85%) 31.376 31.67635 × 1.5 33.5 33.62 (85%) 33.376 33.67636 × 3 33 33.2 (85%) 32.752 33.252 36 × 2 34 34.2 (85%) 33.835 34.210 36 × 1.5 34.5 34.62 (85%) 34.376 34.67638 × 1.5 36.5 36.62 (85%) 36.376 36.67639 × 3 36 36.2 (85%) 35.752 36.252 39 × 2 37 37.2 (85%) 36.835 37.21039 × 1.5 37.5 37.62 (85%) 37.376 37.67640 × 3 37 37.2 (85%) 36.752 37.252 40 × 2 38 38.2 (85%) 37.835 38.210 40 × 1.5 38.5 38.62 (85%) 38.376 38.676 42 × 4 38 38.1 (90%) 37.670 38.270 42 × 3 39 39.2 (85%) 38.752 39.252 42 × 2 40 40.2 (85%) 39.835 40.210 42 × 1.5 40.5 40.62 (85%) 40.376 40.676 45 × 4 41 41.1 (90%) 40.670 41.270 45 × 3 42 42.2 (85%) 41.752 42.252 45 × 2 43 43.2 (85%) 42.835 43.210 45 × 1.5 43.5 43.62 (85%) 43.376 43.676 48 × 4 44 44.1 (90%) 43.670 44.270 48 × 3 45 45.2 (85%) 44.752 45.252 48 × 2 46 46.2 (85%) 45.835 46.21048 × 1.5 46.5 46.62 (85%) 46.376 46.676 50 × 3 47 47.2 (85%) 46.752 47.252 50 × 2 48 48.2 (85%) 47.835 48.210 50 × 1.5 48.5 48.62 (85%) 48.376 48.676 註(1)等級：6H(2)基於JIS B 0211-1982標準3、美制粗牙螺紋(單位：mm)螺纹尺寸钻头直径2B级螺纹下孔徑內螺紋小徑最小直径最大直径NO.1 -64UNC 1.55 1.57 (65%) 1.425 1.5822 -56 1.8 1.86 (65%) 1.695 1.8713 -48 2.1 2.14 (65%) 1.941 2.1464 -40 2.3 2.36 (70%) 2.157 2.3855 -40 2.6 2.69 (70%) 2.487 2.6976 -32 2.8 2.86 (75%) 2.642 2.8958 -32 3.4 3.52 (75%) 3.302 3.530 10 -24 3.9 3.91 (80%) 3.683 3.962 12 -24 4.5 4.57 (80%) 4.344 4.5971/4 -20 5.1 5.25 (80%) 4.979 5.2575/16 -18 6.6 6.72 (80%) 6.401 6.7313/8 -16 8 8.15 (80%) 7.798 8.153 7/16 -14 9.4 9.50 (80%) 9.144 9.550 1/2 -13 10.8 11.0 (80%) 10.592 11.023 9/16 -12 12.2 12.3 (85%) 11.989 12.446 5/8 -11 13.6 13.8 (85%) 13.386 13.868 3/4 -10 16.5 16.8 (80%) 16.307 16.840 7/8 - 9 19.5 19.6 (85%) 19.177 19.761 1 - 8 22.2 22.5 (85%) 21.971 22.6061 1/8 - 7 25 25.2 (85%) 24.638 25.3491 1/4 - 7 28.2 28.4 (85%) 27.813 28.5241 3/8 - 6 30.8 31.0 (85%) 30.353 31.1151 1/2 - 6 34 34.2 (85%) 33.528 34.2901 3/4 - 5 39.5 39.8 (85%) 38.964 39.8272 - 4 45.2 45.3 (90%) 44.679 45.593 4、美制細牙螺紋(單位：mm)螺纹尺寸钻头直径2B级螺纹下孔徑內螺紋小徑最小直径最大直径NO. 0 -80UNF 1.25 1.30 (65%) 1.182 1.3051 -72 1.55 1.61 (65%) 1.474 1.6122 -64 1.85 1.90 (65%) 1.756 1.9123 -56 2.1 2.17 (70%) 2.025 2.1974 -48 2.4 2.44 (70%) 2.271 2.4585 -44 2.7 2.74 (70%) 2.551 2.7406 -40 2.9 3.02 (70%) 2.820 3.0228 -36 3.5 3.59 (75%) 3.404 3.60610 -32 4.1 4.14 (80%) 3.963 4.16512 -28 4.6 4.70 (80%) 4.496 4.7241/4 -28 5.5 5.56 (80%) 5.360 5.5885/16 -24 6.9 7.02 (80%) 6.782 7.0353/8 -24 8.5 8.61 (80%) 8.382 8.6367/16 -20 9.9 10.01 (80%) 9.729 10.033 1/2 -20 11.5 11.60 (80%) 11.329 11.607 9/16 -18 12.9 13.07 (80%) 12.751 13.081 5/8 -18 14.5 14.65 (80%) 14.351 14.681 3/4 -16 17.5 17.59 (85%) 17.323 17.678 7/8 -14 20.5 20.6 (85%) 20.270 20.675 1 -12 23.2 23.5 (85%) 23.114 23.571 1 1/8 -12 26.5 26.7 (80%) 26.289 26.746 1 1/4 -12 29.5 29.9 (80%) 29.464 29.921 1 3/8 -12 32.8 33.0 (85%) 32.639 33.096 1 1/2 -12 36 36.2 (85%) 35.814 36.271 5、英制粗牙螺紋(單位：mm) 螺紋尺寸下孔徑嵌合率A列(硬材質) B列(軟材質)A列直徑B列直徑內螺紋最小徑內螺紋最大徑W 1/8 2.6 2.5 70.7 83.0 70.0 88.3 3/16 3.7 3.6 78.4 85.8 70.0 88.3 1/4 5.1 5.0 76.9 83.0 70.5 88.3 5/16 6.6 6.5 74.0 99.5 70.1 88.4 3/8 8.0 7.9 75.0 80.0 69.5 88.2 7/16 9.4 9.3 73.7 80.0 69.0 88.8 1/2 10.7 10.5 73.8 81.2 69.0 88.2 9/16 12.3 12.0 73.4 84.4 69.0 88.2 5/8 13.7 13.5 73.5 80.3 69.6 88.5 3/4 16.7 16.5 72.3 78.4 69.6 88.3 7/8 19.5 19.3 75.4 80.9 70.1 88.4 1 22.4 22.0 73.8 83.6 71.0 88.2 1 1/8 25.0 24.8 76.9 81.3 72.0 88.4 1 1/4 28.3 28.0 74.3 80.7 72.0 88.4 1 3/8 30.5 30.3 81.6 85.3 73.8 88.6 1 1/2 33.8 33.5 79.3 84.8 73.8 88.6 1 5/8 36.0 35.7 81.1 85.7 74.8 88.3 1 3/4 39.2 39.0 80.7 83.8 74.8 88.31 7/8 41.8 41.5 80.6 84.7 74.7 88.42 45.0 44.7 80.2 84.4 74.7 88.4 6、英制管用螺紋(單位：mm)管用螺紋尺寸JIS B 0203 JIS B 2301錐管內螺紋Rc(PT) 平行內螺紋Rp(PS) 錐管內螺紋計算值下孔徑計算值下孔徑計算值下孔徑1/16 6.230 6.2 6.490 6.5 －－1/8 8.235 8.2 8.495 8.5 8.191 8.2 1/4 10.941 10.9 11.341 11.4 10.945 10.9 3/8 14.428 14.4 14.846 14.9 14.388 14.4 1/2 17.950 18 18.489 18.5 17.943 18 3/4 23.349 23 23.975 24 23.305 23 1 29.423 29 30.111 30 29.353 29 1 1/4 37.940 38 38.772 39 37.890 381 1/2 43.833 44 44.565 45 43.720 432 55.412 55 56.476 56 55.406 552 1/2 70.701 71 72.009 72 70.788 703 83.201 83 84.709 85 83.364 833 1/2 95.547 96 97.155 97 95.747 954 107.834 108 109.855 110 108.322 1085 133.110 133 135.255 135 133.597 1336 158.510 159 160.655 161 158.810 1587 183.360 183 185.954 1868 208.560 209 211.354 2129 233.960 234 236.754 23710 259.166 259 262.154 26212 309.747 310 312.875 3137、美制管用耐密斜行螺紋(NPTF‧NPSF) (單位：mm)管用螺紋尺寸斜行螺紋(NPTF) 平行螺紋(NPSF)鑽頭直徑鑽頭直徑使用鉸刀場合不使用鉸刀合1/16 －0.234 ( 5.94) 0.246 ( 6.25) 1/4 0.250 ( 6.35) 1/8 21/64 0.328 ( 8.33) 0.339 ( 8.61) 11/32 0.344 ( 8.74)1/4 27/64 0.422 (10.72) 7/16 0.438 (11.13) －0.444 (11.28) 3/8 9/16 0.562 (14.27) 37/64 0.578 (14.68) 37/64 0.578 (14.68) 1/2 11/16 0.688 (17.48) 45/64 0.703 (17.86) 23/32 0.719 (18.26) 3/4 57/64 0.891 (22.63) 59/64 0.922 (23.42) －0.922 (23.42) 1 1 1/8 1.125 (28.58) 1 5/32 1.156 (29.36) 1 5/32 1.156 (29.36) 1 1/4 1 15/32 1.469 (37.31) 11/21.500 (38.10) －－1 1/2 1 45/64 1.703 (43.26) 147/641.734 (44.04) －－2 2 3/16 2.188 (55.58) 2 7/32 2.219 (56.36) －－2 1/2 2 19/32 2.594 (65.89) 241/642.641 (67.08) －－上述鑽頭直徑來源於美制管用耐密斜行螺紋ANSI B1.20.3—1957 Dryseal Pipe Threads (Inch)標準8、公制螺紋(NRT) (單位：mm)螺紋尺寸1級螺紋用下孔徑2級螺紋用下孔徑RH 精度最小～最大(嵌合率％)RH精度最小～最大(嵌合率％)M 1 ×0.25 2 0.87 ~ 0.89 (100~85) 4 0.90 ~0.92 (100~80) 1.1×0.25 2 0.97 ~ 0.99 (100~85) 4 1.00 ~1.02 (100~80) 1.2×0.25 2 1.07 ~ 1.09 (100~85) 4 1.10 ~1.12 (100~80) 1.4×0.3 2 1.244~ 1.263 (100~85) 4 1.270~ 1.294 (100~80)1.7×0.35 2 1.51 ~ 1.54 (100~80) 4 1.54 ~ 1.58 (100~75)2 ×0.4 2 1.78 ~ 1.82 (100~80) 4 1.81 ~ 1.85 (100~75) 2.3×0.4 2 2.08 ~ 2.12 (100~80) 4 2.11 ~ 2.15 (100~75) 2.5×0.45 2 2.25 ~ 2.29 (100~80) 4 2.28 ~ 2.33 (100~75)2.6×0.45 2 2.35 ~ 2.39 (100~80) 4 2.38 ~ 2.43 (100~75)3 ×0.5 3 2.74 ~ 2.78 (100~80)5 2.76 ~ 2.81 (100~75)3.5×0.6 3 3.18 ~ 3.21 (100~85) 5 3.20 ~ 3.26 (100~75)4 ×0.7 4 3.63 ~ 3.67 (100~85) 6 3.65 ~ 3.70 (100~85)5 ×0.8 4 4.57 ~ 4.62 (100~85)6 4.59 ~ 4.66 (100~80)6 ×1 4 5.45 ~ 5.51 (100~85)7 5.48 ~ 5.57 (100~80)7 ×1 4 6.45 ~ 6.51 (100~85) 7 6.48 ~ 6.57 (100~80)8 ×1.25 5 7.31 ~ 7.38 (100~85) 7 7.34 ~ 7.41 (100~85) 8 ×1 4 7.45 ~ 7.51 (100~85) 7 7.48 ~ 7.57 (100~80) 10 ×1.5 5 9.16 ~ 9.22 (100~90) 7 9.18 ~ 9.28 (100~85) 10 ×1.25 5 9.31 ~ 9.38 (100~85) 7 9.34 ~ 9.41 (100~85) 10 ×1 5 9.46 ~ 9.52 (100~85) 7 9.48 ~ 9.57 (100~80) 12 ×1.75 5 11.01 ~11.08 (100~90) 8 11.05 ~11.15 (100~85) 12 ×1.5 5 11.16 ~11.22 (100~90) 7 11.18 ~11.28 (100~85) 12 ×1.25 5 11.31 ~11.38 (100~85) 7 11.34 ~11.41 (100~85) 12 ×1 5 11.46 ~11.52 (100~85) 7 11.48 ~11.57 (100~80) 14 ×2 6 12.83 ~12.95 (100~90) 10 12.92 ~13.04 (100~85) 14 ×1.5 5 13.16 ~13.22 (100~90) 9 13.21 ~13.30 (100~85) 16 ×2 6 14.87 ~14.95 (100~90) 10 14.92 ~15.04 (100~85) 16 ×1.5 5 15.16 ~15.22 (100~90) 9 15.21 ~15.30 (100~80) 18 ×2.5 6 16.57 ~16.67 (100~90) 11 16.63 ~16.78 (100~85) 18 ×1.5 6 17.17 ~17.23 (100~90) 10 17.22 ~17.31 (100~85) 20 ×2.5 6 18.57 ~18.67 (100~90) 11 18.63 ~18.78 (100~85) 20 ×1.5 6 19.17 ~19.23 (100~90) 10 19.22 ~19.31 (100~85) 9、美制粗牙螺紋(NRT) (單位：mm)螺紋尺寸2B級螺紋用下孔徑3B級螺紋用下孔徑RH 最小～最大RH 最小～最大精度(嵌合率％) 精度(嵌合率％)NO. 2-56UNC 4 1.96 ~ 2.02 (100~65) 3 1.95 ~ 2.01 (100~65) 3-48 4 2.25 ~ 2.32 (100~65) 3 2.23 ~ 2.31 (100~65) 4-40 5 2.52 ~ 2.60 (100~70) 3 2.50 ~ 2.58 (100~70) 5-40 5 2.86 ~ 2.93 (100~70) 3 2.83 ~ 2.91 (100~70) 6-32 5 3.09 ~ 3.17 (100~75) 3 3.06 ~ 3.14 (100~75) 8-32 6 3.75 ~ 3.83 (100~75) 4 3.74 ~ 3.82 (100~75) 10-24 6 4.26 ~ 4.35 (100~80) 4 4.24 ~ 4.32 (100~80) 12-24 6 4.92 ~ 5.01 (100~80) 4 4.90 ~ 4.96 (100~85) 1/4 -20 6 5.66 ~ 5.76 (100~80) 4 5.64 ~ 5.74 (100~80) 5/16 -18 7 7.18 ~ 7.29 (100~80) 5 7.15 ~ 7.24 (100~85) 3/8 -16 7 8.66 ~ 8.78 (100~80) 5 8.63 ~ 8.73 (100~85) 7/16 -14 7 10.11 ~10.25 (100~80) 5 10.08 ~10.19 (100~85) 1/2 -13 8 10.62 ~11.78 (100~80) 6 11.60 ~11.68 (100~90) 9/16 -12 10 13.14 ~13.27 (100~85) 8 13.11 ~13.24 (100~85) 5/8 -11 11 14.62 ~14.76 (100~85) 8 14.58 ~14.67 (100~90) 3/4 -10 12 17.67 ~17.88 (100~80) 9 17.63 ~17.74 (100~90) 7/8 - 9 12 20.68 ~20.85 (100~85) 9 20.64 ~20.75 (100~90)1 - 8 13 23.65 ~23.84 (100~85) 10 23.61 ~23.74 (100~90)二、螺紋下孔徑表(無屑絲攻用)1、美制細牙螺紋(NRT) (單位：mm)螺紋尺寸2B級螺紋用下孔徑3B級螺紋用下孔徑RH 精度最小～最大(嵌合率％)RH精度最小～最大(嵌合率％)NO. 2-64UNF 3 1.98 ~ 2.04 (100~65) 2 1.97 ~ 2.03 (100~65) 3-56 4 2.29 ~ 2.35 (100~65) 3 2.28 ~ 2.34 (100~65) 4-48 4 2.57 ~ 2.64 (100~70) 3 2.56 ~ 2.63 (100~70) 5-44 4 2.88 ~ 2.95 (100~70) 3 2.87 ~ 2.94 (100~70) 6-40 5 3.19 ~ 3.26 (100~70) 3 3.16 ~ 3.22 (100~75) 8-36 5 3.80 ~ 3.88 (100~75) 4 3.79 ~ 3.86 (100~75) 10-32 5 4.41 ~ 4.48 (100~80) 4 4.40 ~ 4.46 (100~80) 12-28 5 5.00 ~ 5.08 (100~80) 4 4.99 ~ 5.06 (100~80) 1/4 -28 5 5.86 ~ 5.93 (100~80) 4 5.85 ~ 5.92 (100~80) 5/16-24 6 7.38 ~ 7.46 (100~80) 5 7.36 ~ 7.43 (100~85) 3/8 -24 6 8.96 ~ 9.05 (100~80) 5 8.95 ~ 9.02 (100~85) 7/16-20 7 10.44 ~10.54 (100~80) 5 10.41 ~10.49 (100~85) 1/2 -20 7 12.02 ~12.12 (100~80) 5 12.00 ~12.05 (100~90) 9/16-18 9 13.55 ~13.66 (100~80) 7 13.53 ~13.58 (100~90) 5/8 -18 9 15.14 ~15.25 (100~80) 7 15.11 ~15.17 (100~90) 3/4 -16 10 18.22 ~18.32 (100~85) 7 18.18 ~18.25 (100~90) 7/8 -14 11 21.27 ~21.38 (100~85) 8 21.23 ~21.27 (100~95)1 - 12 12 24.28 ~24.41 (100~85) 9 24.24 ~24.32 (100~90)2、英制管用平行螺紋(NRT) (單位：mm)螺紋尺寸RH精度最小～最大(嵌合率％)PF 1/8 6 9.24~ 9.35 (100~80)1/4 7 12.41~12.62 (100~75)3/8 7 15.92~16.12 (100~75)1/2 8 19.93~20.15 (100~80)3/4 8 25.41~25.64 (100~80)3、公制螺紋(HRT) (單位：mm)螺紋尺寸1級螺紋用下孔徑2級螺紋用下孔徑RH 精度最小～最大(嵌合率％)RH精度最小～最大(嵌合率％)M 1 ×0.25 2 0.858~0.879 (100~85) 4 0.858~0.887 (100~80) 1.2×0.25 2 1.058~1.079 (100~85) 4 1.058~1.087 (100~80) 1.4×0.3 2 1.23 ~1.26 (100~85) 4 1.23 ~1.26 (100~80) 1.6×0.35 2 1.40 ~1.44 (100~80) 4 1.40 ~1.45 (100~75) 1.7×0.35 － 1.50 ~1.54 (100~80) 4 1.50 ~1.55 (100~75)1.8×0.35 2 1.60 ~1.64 (100~80) 4 1.60 ~1.65 (100~75)2 ×0.4 2 1.77 ~1.82 (100~80) 4 1.77 ~1.82 (100~80) 2 ×0.25 2 1.858~1.887 (100~80) － 1.858~1.887 (100~80) 2.3×0.4 － 2.07 ~2.12 (100~80) 4 2.07 ~2.13 (100~75) 2.5×0.45 3 2.24 ~2.30 (100~80)5 2.24 ~2.31 (100~75)2.6×0.45 － 2.34 ~2.40 (100~80) 5 2.34 ~2.41 (100~75)3 ×0.6 3 2.72 ~2.73 (100~90) 5 2.66 ~2.73 (100~90) 3 ×0.5 5 2.72 ~2.77 (100~80) 6 2.72 ~2.78 (100~75) 3 ×0.35 3 2.80 ~2.84 (100~80)5 2.80 ~2.85 (100~75)3.5×0.6 3 3.16 ~3.21 (100~85) 5 3.16 ~3.25 (100~75)4 ×0.75 3 3.57 ~3.64 (100~85)6 3.57 ~3.64 (100~85) 4 ×0.7 6 3.60 ~3.66 (100~85) 7 3.60 ~3.66 (100~85)4 ×0.5 3 3.71 ~3.77 (100~80)6 3.71 ~3.79 (100~75)5 ×0.9 3 4.49 ~4.59 (100~85) 7 4.49 ~4.59 (100~85) 5 ×0.8 3 4.55 ~4.62 (100~85) 8 4.55 ~4.64 (100~80)5 ×0.5 3 2.72 ~4.77 (100~80)6 4.72 ~4.79 (100~75)6 ×1 4 5.43 ~5.52 (100~85)7 5.43 ~5.55 (100~80) 6 ×0.75 3 5.57 ~5.64 (100~85) 7 5.57 ~5.66 (100~80)4、公制粗牙螺紋HL-NRT (單位：mm)螺紋尺寸RH精度最小～最大(嵌合率％) M 3 ×0.5 3 3.39~3.43 (100~80)4 ×0.7 4 4.54~4.58 (100~85)5 ×0.8 4 5.61~5.66 (100~85)6 ×1 4 6.75~6.81 (100~85)8 ×1.25 5 8.93~9.01 (100~85)10 ×1.5 5 11.11~11.17 (100~90)10 ×1.25 5 10.93~11.01 (100~85)12 ×1.75 5 13.28~13.17 (100~90)12 ×1.5 5 13.11~13.17 (100~90)12 ×1.25 5 12.93~13.01 (100~85)三、螺紋下孔徑表(護套螺紋用)1、公制粗牙螺紋(單位：mm)螺紋尺寸下孔徑鑽頭直徑最小直徑最大直徑M 2.5 ×0.45 2.60 2.65 2.62.6 ×0.45 2.70 2.75 2.73 ×0.5 3.12 3.20 3.14 ×0.7 4.17 4.30 4.25 ×0.8 5.16 5.33 5.26 × 1 6.25 6.42 6.38 × 1.25 8.31 8.52 8.414 × 2 14.49 14.83 14.516 × 2 16.49 16.83 16.518 × 2.5 18.58 19.04 19.020 × 2.5 20.58 21.04 21.022 × 2.5 22.58 23.04 23.024 × 2.5 24.70 25.25 25.02、公制細牙螺紋(單位：mm) 螺紋尺寸下孔徑鑽頭直徑最小直徑最大直徑M 10 × 1 10.25 10.42 10.310 × 1.25 10.31 10.52 10.412 × 1.25 12.31 12.52 12.512 × 1.5 12.37 12.62 12.514 × 1.5 14.37 14.62 14.516 × 1.5 16.37 16.62 16.518 × 1.5 18.37 18.62 18.520 × 1.5 20.37 20.62 20.520 × 2 20.47 20.83 20.522 × 1.5 22.37 22.62 22.524 × 1.5 24.37 24.62 24.524 × 2 24.47 24.83 24.530 × 1.5 30.37 30.62 30.53、美制粗牙螺紋(單位：mm)螺紋尺寸下孔徑鑽頭直徑最小直徑最大直徑NO. 2 –56UNC 2.29 2.39 2.33 –48 2.64 2.74 2.74 –40 2.95 3.07 3.05 –40 3.25 3.38 3.36 –32 3.66 3.81 3.78 –32 4.32 4.47 4.410 –24 5.05 5.21 5.112 –24 5.61 5.77 5.71/4 –20 6.63 6.78 6.75/16 –8 8.33 8.48 8.43/8 –16 9.91 10.11 10.07/16 –14 11.51 11.76 11.51/2 –13 13.08 13.34 13.19/16 –12 14.68 14.94 14.74、美制細牙螺紋(單位：mm)螺紋尺寸下孔徑鑽頭直徑最小直徑最大直徑NO. 4 –48UNF 2.97 3.05 3.010 –32 4.98 5.13 5.01/4 –28 6.53 6.71 6.65/16 –24 8.20 8.38 8.23/8 –24 9.78 9.96 9.87/16 –20 11.43 11.63 11.51/2 –20 13.03 13.26 13.19/16 –18 14.66 14.88 14.75/8 –18 16.26 16.48 16.33/4 –16 19.43 19.68 19.57/8 –14 22.61 22.86 22.71 –12 25.76 26.04 26.0各種換算表管用螺絲基準寸法(mm)規格英制JIS(PT) 美式ASA(NPT)山數外徑有效徑山數外徑有效徑1/16 7.723 27 7.77 7.142 1/8 28 9.728 9.147 27 10.116 9.489 1/4 19 13.157 12.301 18 13.427 12.487 3/8 19 16.662 15.806 18 16.866 15.926 1/2 14 20.955 19.793 14 20.980 19.772 3/4 14 26.441 25.279 14 26.326 25.1171 11 33.249 31.770 111/2 33.932 31.46111/4 11 41.910 40.431 111/2 41.689 40.218 11/2 11 47.803 46.324 111/2 47.689 46.2872 11 59.614 58.135 111/2 59.796 58.32521/2 11 75.184 73.705 8 72.273 70.1593 11 87.884 86.405 8 88.182 86.06831/2 11 100.330 98.851 8 100.691 98.7764 11 113.030 111.551 8 113.548 111.43341/2 11 125.730 124.2515 11 138.430 136.951 8 141.3 138.41251/2 11 151.130 149.6516 11 163.830 162.351 8 168.3 165.2527 11 189.230 187.7518 11 214.630 213.151 8 219.1 215.901美制螺絲外徑公厘(mm)換算表規格吋mmNO. 0 0.0600 1.5241 0.0730 1.8542 0.0860 2.1843 0.0990 2.5154 0.1120 2.8455 0.1250 3.1756 0.1380 3.5058 0.1640 4.16610 0.1900 4.82612 0.2160 5.486山數節距換算表山數(每25.4mm) 節距mm 100 0.254080 0.317572 0.352864 0.396960 0.423356 0.453648 0.529244 0.577340 0.635036 0.705632 0.793828 0.907124 1.058320 1.270018 1.411116 1.587514 1.814313 1.953812 2.116711 2.309110 2.54009 2.82228 3.17507 3.62866 4.23335 5.08004 1/2 5.64444 6.35003 1/2 7.25713 1/4 7.81543 8.46672 7/8 8.83482 3/4 9.23642 5/8 9.67622 1/2 10.1600。
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。
攻牙孔径表
yangqingyu2537打个招呼 书生三级2楼复制 引用回复:谁有YAMAWA的公英制钻孔攻牙… 发表于2008-08-02 09:39 版主奖励：20点攻牙孔徑表公制牙-細牙 英制牙-粗牙 美制牙-細牙 美制牙-粗牙 管用螺紋 管用螺紋-美制牙公制牙 粗牙 無溝絲攻適用孔徑 螺紋牙套適用孔徑規格 最小孔徑 建議孔徑 最小孔徑 最大孔徑 最小孔徑 最大孔徑M 1*0.25 0.73 0.78 M1.1*0.25 0.83 0.89 M1.2*0.25 0.93 0.98 M1.4*0.3 1.08 1.14 1.23 1.26 M1.6*0.35 1.22 1.32 M1.7*0.35 1.33 1.42 1.5 1.55 M1.8*0.35 1.42 1.52 M 2*0.4 1.57 1.67 1.77 1.83 M2.2*0.45 1.71 1.84 1.95 2.01 M2.3*0.4 1.87 1.97 2.07 2.13 M2.5*0.45 2.01 2.14 2.25 2.31 M2.6*0.45 2.12 2.23 2.35 2.41 M 3*0.5 2.46 2.6 2.64 2.72 2.79 3.12 3.2M3.5*0.6 2.85 3.01 3.05 3.16 3.24 M 4*0.7 3.24 3.42 3.47 3.6 3.69 4.17 4.3M4.5*0.75 3.69 3.88 3.92 4.07 4.17 M 5*0.8 4.13 4.33 4.38 4.55 4.65 5.16 5.33M 6*1.0 4.92 5.15 5.22 5.43 5.55 6.25 6.42M 7*1.0 5.92 6.15 6.22 6.43 6.55 7.25 7.42M 8*1.25 6.65 6.91 6.98 7.29 7.42 8.31 8.52M 9*1.25 7.65 7.91 7.98 8.29 8.42 M 10*1.5 8.38 8.68 8.75 9.15 9.3 10.37 10.62M 11*1.5 9.38 9.68 9.75 10.15 10.3 M 12*1.75 10.11 10.44 10.53 11.01 11.19 12.43 12.73M 14*2.0 11.84 12.21 12.31 14.49 14.83M 16*2.0 13.84 14.21 14.31 16.49 16.83M 18*2.5 15.29 15.74 15.85 18.58 19.04M 20*2.5 17.29 17.74 17.85 20.58 21.04M 22*2.5 19.29 19.74 19.85 M 24*3.0 20.75 21.25 21.38 M 27*3.0 23.75 24.25 24.38 M 30*3.5 26.21 26.77 26.92 M 33*3.5 29.21 29.77 29.92 M 36*4.0 31.67 32.27 32.42 M 39*4.0 34.67 35.27 32.42 M 42*4.5 37.13 37.8 37.98 M 45*4.5 40.13 40.8 40.98 M 48*5.0 42.59 43.3 43.49 英制牙 粗牙 無溝絲攻 適用孔徑 螺紋牙套 適用孔徑規格 最小孔徑 最大孔徑 最小孔徑 最大孔徑 最小孔徑 最大孔徑W 1/16-60 1.3 W 3/32-48 1.9 W 1/8 -40 2.6 W 5/32-32 3.2 W 3/16-24 3.8 W 1/4 -20 5 5.1 5.63 5.77 W 5/16-18 6.5 6.6 7.13 7.3 W 3/8 -16 7.9 8 8.63 8.8 W 7/16-14 9.3 9.4 10.09 10.29 W 1/2 -12 10.5 10.7 11.6 11.82 W 9/16 -12 12 12.3 W 5/8 -11 13.5 13.7 W 3/4 -10 16.5 16.7 W 7/8 -9 19.3 19.5 W 1 -8 22 22.4 W1-1/8 -7 24.8 25 W1-1/4 -7 28 28.3 W1-3/8 -6 30.3 30.5 W1-1/2 -6 33.5 33.8 W1-5/8 -5 35.7 36 W1-3/4 -5 39 39.2 W1-7/8 -4.5 41.5 41.8 W 2 -4.5 44.7 45 美制牙 粗牙 無溝絲攻 適用孔徑 螺紋牙套 適用孔徑規格 最小孔徑 最大孔徑 最小孔徑 最大孔徑 最小孔徑 最大孔徑NO. 1-64UNC 1.43 1.58 1.63 1.71 NO. 2-56UNC 1.69 1.87 1.93 2.02 NO. 3-48UNC 1.94 2.15 2.22 2.32 NO. 4-40UNC 2.16 2.39 2.49 2.61 2.95 3.07NO. 5-40UNC 2.49 2.7 2.82 2.92 3.25 3.38NO. 6-32UNC 2.64 2.9 3.05 3.19 3.66 3.81NO. 8-32UNC 3.3 3.53 3.71 3.83 4.32 4.47NO.10-24UNC 3.68 3.96 4.23 4.37 5.05 5.21NO.12-24UNC 4.34 4.6 4.88 5.02 1/4 -20UNC 4.98 5.26 5.63 5.77 6.63 6.785/16-18UNC 6.4 6.73 7.13 7.3 8.33 8.483/8 -16UNC 7.8 8.15 8.63 8.8 9.91 10.117/16-14UNC 9.14 9.55 10.09 10.29 11.51 11.761/2 -13UNC 10.59 11.02 11.6 11.82 13.08 13.349/16-12UNC 11.99 12.45 14.68 14.945/8 -11UNC 13.39 13.87 16.59 16.843/4 -10UNC 16.31 16.84 19.84 20.097/8 -9 UNC 19.18 19.76 1 -8 UNC 21.97 22.61 1-1/8 -7 UNC 24.64 25.35 1-1/4 -7 UNC 27.81 28.52 1-3/8 -6 UNC 30.35 31.12 1-1/2 -6 UNC 33.53 34.29 1-3/4 -5 UNC 38.96 39.83 2 - 4 1/2UNC 44.68 45.59公制牙 細牙 無溝絲攻 適用孔徑 螺紋牙套 適用孔徑規格 最小孔徑 建議孔徑 最小尺寸 最大尺寸 最小孔徑 最大孔徑M2.5*0.35 2.12 2.22 2.3 2.35 M 3*0.35 2.62 2.72 2.8 2.85 M3.5*0.35 3.12 3.22 3.3 3.35 M 4*0.5 3.46 3.6 3.64 3.72 3.79 M4.5*0.5 3.96 4.1 4.14 4.22 4.29 M 5*0.5 4.46 4.6 4.64 4.72 4.79 M5.5*0.5 4.96 5.1 5.14 5.22 5.29 M 6*0.75 5.19 5.38 5.42 5.57 5.67 M 7*0.75 6.19 6.38 6.42 6.57 6.67 M 8*1.0 6.92 7.15 7.22 7.43 7.55 8.25 8.42M 8*0.75 7.19 7.38 7.42 7.57 7.67 M 9*1.0 7.92 8.15 8.22 8.43 8.55 M 9*0.75 8.19 8.38 8.42 8.57 8.67 M 10*1.25 8.65 8.91 8.98 9.29 9.43 10.31 10.52M 10*1.0 8.92 9.15 9.22 9.43 9.55 10.25 10.42M 10*0.75 9.19 9.38 9.42 9.57 9.67 M 11*1.25 9.52 9.8 9.88 M 11*1.0 9.92 10.15 10.22 10.43 10.55 M 11*0.75 10.19 10.38 10.42 10.57 10.67 M 12*1.5 10.38 10.68 10.75 11.15 11.3 12.37 12.62M 12*1.25 10.65 10.91 10.98 11.29 11.43 12.31 12.52M 12*1.0 10.92 11.15 11.22 11.43 11.55 M 14*1.5 12.38 12.68 12.75 14.37 14.4M 14*1.0 12.92 13.15 13.22 M 15*1.5 13.38 13.68 13.75 M 15*1.0 13.92 14.15 14.22 M 16*1.5 14.38 14.68 14.75 16.37 16.62M 16*1.0 14.92 15.15 15.22 M 17*1.5 15.38 15.68 15.75 M 17*1.0 15.92 16.15 16.22 M 18*2.0 15.84 16.21 16.31 M 18*1.5 16.38 16.68 16.75 18.37 18.62M 18*1.0 16.92 17.15 17.22 M 20*2.0 17.84 18.21 18.31 M 20*1.5 18.38 18.68 18.75 20.37 20.62 M 20*1.0 18.92 19.15 19.22 M 22*2.0 19.84 20.21 20.31 M 22*1.5 20.38 20.68 20.75 M 22*1.0 20.92 21.15 21.22 M 24*2.0 21.84 22.21 22.31 M 24*1.5 22.38 22.68 22.75 M 24*1.0 22.92 23.15 23.22 M 25*2.0 22.84 23.21 23.31 M 25*1.5 23.38 23.68 23.75 M 25*1.0 23.92 24.15 24.22 M 26*2.0 23.63 24.08 24.18 M 26*1.5 24.38 24.68 24.75 M 27*2.0 24.84 25.21 25.31 M 27*1.5 25.38 25.68 25.75 M 27*1.0 25.92 26.15 26.22 M 28*2.0 25.84 26.21 26.31 M 28*1.5 26.38 26.68 26.75 M 28*1.0 26.92 27.15 27.22 M 30*3.0 26.75 27.25 27.38 M 30*2.0 27.84 28.21 28.31 M 30*1.5 28.38 28.68 28.75 M 30*1.0 28.92 29.15 29.22 M 32*2.0 29.84 30.21 30.31 M 32*1.5 30.38 30.68 30.75 M 33*3.0 29.75 30.25 30.38 M 33*2.0 30.84 31.21 31.31 M 33*1.5 31.38 31.68 31.75 M 35*1.5 33.38 33.68 33.75 M 36*3.0 32.75 33.25 33.38 M 36*2.0 33.84 34.21 34.31 M 36*1.5 34.38 34.68 34.75 M 38*2.0 35.62 36.08 36.18 M 38*1.5 36.38 36.68 36.75 M 39*3.0 35.75 36.25 36.38 M 39*2.0 36.84 37.21 37.31 M 39*1.5 37.38 37.68 37.75 M 40*3.0 36.75 37.25 37.38 M 40*2.0 37.84 38.21 38.31 M 40*1.5 38.38 38.68 38.75 M 42*4.0 37.67 38.27 38.42 M 42*3.0 38.75 39.25 39.38 M 42*2.0 39.84 40.21 40.31 M 42*1.5 40.38 40.68 40.75 M 45*4.0 40.67 41.27 41.42 M 45*3.0 41.75 42.25 42.38 M 45*2.0 42.84 43.21 43.31 M 45*1.5 43.38 43.68 43.75 M 48*4.0 43.67 44.27 44.42 M 48*3.0 44.75 45.25 45.38 M 48*2.0 45.84 46.21 46.31 M 48*1.5 46.38 46.68 46.75 M 50*3.0 46.75 47.25 47.38 M 50*2.0 47.84 48.21 48.31 。
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 2级牙钻孔径 2级牙钻孔径 标准径 规格（UNC） 标准径 最大 最小 最大 NO.10.75 0.785 0.729 64(1.854) 1.55 1.582 NO.20.85 0.885 0.829 56(2.184) 1.8 1.871 NO.30.95 0.985 0.985 48(2.515) 2.1 2.146 NO.41.1 1.142 1.075 40(2.845) 2.3 2.385 NO.51.25 1.321 1.221 40(3.175) 2.6 2.697 NO.61.35 1.421 1.321 32(3.505) 2.8 2.895 NO81.45 1.521 1.421 32(4.166) 3.4 3.53 NO.101.6 1.679 1.567 24(4.826) 3.9 3.962 NO.121.75 1.838 1.713 24(5.486) 4.5 4.597 1.9 1.979 1.867 2001/4/20 5.1 5.257 2.1 2.138 2.013 5/16-18 6.6 6.731 2.2 2.238 2.113 2003/8/16 8 8.153 2.5 2.599 2.459 7/16-14 9.4 9.55 2.4 2.44 2.28 2001/2/13 10.8 11.023 2.9 3.01 2.85 9/16-12 12.2 12.446 3.3 3.422 3.242 2005/8/11 13.6 12.868 3.25 3.326 3.106 2003/4/10 16.5 18.84 3.8 3.878 3.688 2007/8/9 19.5 19.761 4.2 4.334 4.134 1 22.2 22.606 4.1 4.17 3.93 1-1/8-7 25 25.349 5 5.153 4.917 1-1/4-7 28.2 28.524 6 6.153 5.917 1-3/8-6 30.8 31.115 6.8 6.912 6.647 1-1/2-6 34 34.29 7.8 7.912 7.647 1-3/4-5 39.5 39.827 8.5 8.676 8.376 2-4-1/2 45.2 45.593 9.5 9.676 9.376 10.3 10.441 10.106 12 12.21 11.835 14 14.21 13.835 15.5 15.744 15.294 17.5 17.744 17.294 19.5 19.744 19.294
丝锥的底孔尺寸表
丝锥的底孔尺寸表丝锥是一种常用的工具，用于在金属或其他硬质材料上制作螺纹孔。
而丝锥的底孔尺寸表则是指丝锥底孔的规格尺寸的汇总表格。
底孔尺寸表是制作螺纹孔时的参考依据，根据不同的螺纹规格和要求，选择相应的丝锥底孔尺寸，以确保螺纹孔的质量和精度。
底孔尺寸表中通常包含以下几个重要参数：螺纹规格、螺纹类型、底孔直径、底孔深度等。
不同规格的螺纹需要使用不同直径和深度的底孔。
底孔直径是指在制作螺纹孔时所需要钻的初始孔的直径，底孔深度则是指钻孔的深度。
丝锥底孔尺寸表的制定依据一般是国际标准或行业标准。
不同国家和地区可能有不同的标准，但其中最常见的螺纹标准是ISO螺纹标准。
ISO螺纹标准是国际上广泛采用的一种螺纹标准，包括了各种螺纹规格和底孔尺寸。
底孔尺寸表中的底孔直径通常以毫米（mm）为单位，底孔深度通常以倍径（D）为单位。
倍径是指底孔直径的倍数，用于确定底孔的深度。
在使用丝锥制作螺纹孔时，首先需要根据所需的螺纹规格从底孔尺寸表中找到对应的底孔直径和底孔深度。
然后，使用合适的钻头钻出对应直径的初始孔，并根据底孔深度的要求控制钻孔的深度。
最后，使用丝锥逐步切削，形成所需的螺纹。
需要注意的是，使用丝锥制作螺纹孔需要一定的技术和经验。
在操作过程中，需要注意保持适当的切削速度和切削力，避免过快或过大的切削导致丝锥损坏或螺纹孔质量不理想。
此外，还需要定期对丝锥进行保养和修复，以保持其切削性能和精度。
底孔尺寸表的存在使得丝锥的选择和使用更加方便和准确。
通过参考底孔尺寸表，可以根据螺纹规格和要求选择合适的丝锥底孔尺寸，提高螺纹孔的质量和精度。
同时，底孔尺寸表也是丝锥制造商和使用者之间交流和合作的重要依据，确保丝锥的质量和性能符合标准和要求。
丝锥的底孔尺寸表是丝锥制作螺纹孔时的重要参考工具，通过底孔尺寸表可以选择合适的丝锥底孔尺寸，保证螺纹孔的质量和精度。
在使用丝锥制作螺纹孔时，需要根据底孔尺寸表确定底孔的直径和深度，并注意操作技巧和保养维护，以获得理想的螺纹孔。
螺纹攻牙-钻孔直径对照表
M4.0*0.5 3.50 3.599 3.459 NO.3-56(2.515) 2.10 2.197 2.025
M4.5*0.5 4.00 4.099 3.959 NO.4-48(2.845) 2.40 2.458 2.271
M5.0*0.5 4.50 4.599 4.459 NO.5-44(3.175) 2.70 2.740 2.551
9.31 9.38
9.44
M12*1.75
11.04 11.12 11.21
M12*1.25
11.31 11.38 11.44
美制迫牙丝攻钻孔径
规格 NO. 2-56UNC
精度等级
G1-G6 G7-G8 G9
1.94
..
..
NO. 3-48
2.23
..
..
NO. 4-40
2.50
..
..
NO. 5-40
******本表 依据二级牙
螺 纹 攻 牙 钻 孔 径 和 滚 造 径 对 照 表.
公制粗螺 纹
公制细螺 纹
规格
标准径
二级牙钻孔径 最大 最小
规格
标准径
二级牙钻孔径 最大 最小
M1.0*0.25 0.75 0.785 0.729
M12*1.0
11.00 11.153 10.917
M1.1*0.25 0.85 0.885 0.829
M28*1.0
27.00 27.153 26.917
M24*3.0 21.00 21.252 20.752
M30*3.0
27.00 27.252 26.752
M27*3.0 24.00 24.252 23.752
M30*2.0
YAMAWA无沟丝攻下孔径清表
內螺紋
目標喫合率
Tolerance Zone 0 13 Nomin al Size
（％） 74
目標内径 2.240
※請輸入使用螺 ※請輸入目標 絲攻之精度等級 喫合率百分比 (%)數字。 數字。
（単位:mm）
推薦使用下孔徑
2.44
M1,M1.2,M1.4 M1.6 M1.7 M1.8 M2,M2.3 M2.5 目 M2.6 M3 M3.5 M4 M5 M6 M8 M10 M12 M3x0.35 細 M4x0.5,M5x0.5 目 M6x0.75 M8x1 M10x1.25,M10x1 M12x1.5 M12x1.25 並
YAMAWA
無屑絲攻攻牙下孔徑計算式 無屑絲攻攻牙下孔徑計算式
尺 寸 尺寸径
M2.6x0.45＊ （単位:mm）
D(外径） P（牙距) 2.6 0.450
有効径 公差 0.095
公差域 呼 び
內螺紋精度公差與喫合率規範 内径 max喫合率 min喫合率 内径max 内径min 公差 (%) (%) 2.238 2.113 0.125 74 100
G9 G9 G10
G9 G9 G10
Coarse Thread Fine Thread
G4 G4 G4 G4 G4
G5 G5 G5 G5 G5 G5 G5 G5
２級めねじ
YAMAWA Class2
G級タップ
YAMAWA G Class taps
G6 G6 G6 G7 G6 G6 G7 G8 G6 G7 G8 G7 G8 G7 G8 G7 G8 G8 G5 G6 G6 G7 G6 G7 G7 G8 G7 G8 G8 G8
有効径基準寸法 Basic Pitch Dia.
YAMAWA丝攻P级精度说明
YAMAWA丝攻P级精度说明集团标准化工作小组#Q8QGGQT-GX8G08Q8-GNQGJ8-MHHGN#YAMAWA 丝攻P 级精度说明(2009/09/27 22:13)目录：手阿里网摘浏览字体：YAMAWA丝攻之P级精度是依TAS （日本工具工业会规格）的规定而制定，类似美国的GH级精度。
如表A所示，丝攻的螺距为0.7mm或以上时，丝攻的有效径基准尺寸以0为基准点，每一级的精度公差为20g m,亦即PI级的有效径精度公差为（+0、+20pm）,以此类推，P2 级为（+20、+40） , P3 级为（+40、+60） , P4 级为（+60、+80） o如表B所示，螺丝攻的螺距为0.6mm或以下时丝攻的有效径基准尺寸以10pm 为基准点，每一级的精度公差为即Pl级为（+10pm、+25ym）,以此类推，P2 级为（+25、+40） , P3 级为（+40、+55） , P4 级为（+55、+70）。
为切削符合曰本工业标准（JIS）规格2级螺纹精度之用，本公司对各系列丝攻定有YAMAWA标准P级精度以供用户选用。
螺旋丝攻系列（N- SP、N+SP、OS-N-SP. SU-SP、LS-N-SP）,先端丝攻系列（N-PO、N+PO、OS-N-PO. SU-PO、LS-N-PO）,直槽丝攻系列（SU-HT、LS- HT、HT、OS-HT）等。
另外为配合电镀前用或攻牙后有回缩倾向的材料，本公司另备有比YAMAWA标准P级精度大1级或2级公差的产品（加大尺寸用丝攻）以供用户选用。
此外YAMAWA的P级精度丝攻是相对于切削型丝攻（螺旋、先端、直槽皆属切削型，会产生金属屑）而言，不适合用于挤压丝攻（无屑型丝攻，不会产生金属屑）；而且P级精度的牙形是用于公制牙（M）、美制牙（UNC、UNF、UNEF、UN、UNS）、英制牙（BSW、BSF）等，不用于美制管用螺纹、英制管用螺纹。
点图进入相册YAMAWA丝攻P级精度参考【复制标题和链接，发送给好友】。
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5.13 5.86 6 7.38 7.53 8.89 9.1 10.4 10.62 11.92 12.2
5.03 5.73 5.91 7.23 7.42 8.72 8.99 10.02 10.48 11.70 12.06
推薦 推薦下孔徑(mm) 尺寸 精度 Max Min G4 0.92 0.89 M14 X1 G4 1.11 1.09 M16 X2 G4 1.3 1.26 M16 X1.5 G4 1.47 1.43 M16 X1 G4 1.57 1.52 M18 X2.5 G4 1.67 1.62 M18 X1.5 G4 1.84 1.79 M20 X2.5 G4 1.91 1.89 M20 X1.5 G5 2.04 1.98 No. 0-80UNF G4 2.14 2.09 No. 1-64UNC G5 2.34 2.27 No. 1-72UNF G5 2.38 2.34 No. 2-56UNC G5 2.44 2.37 No. 2-64UNF G5 2.82 2.75 No. 3-48UNC G5 2.87 2.82 No. 3-56UNF G5 3.27 3.19 No. 4-40UNC G5 3.37 3.32 No. 4-48UNF G6 3.72 3.65 No. 5-40UNC G6 3.83 3.76 No. 5-44UNF G6 4.67 4.59 No. 6-32UNC G6 4.83 4.76 No. 6-40UNF G7 5.59 5.49 No. 8-32UNC G6 5.69 5.61 No. 8-36UNF G7 6.59 6.48 No.10-24UNC G7 6.7 6.62 No.10-32UNF G7 7.49 7.36 No.12-24UNC G7 7.59 7.48 No.12-28UNF G7 7.7 7.62 1/4 -20UNC G7 9.34 9.22 1/4 -28UNF G7 9.49 9.35 5/16-18UNC G7 9.59 9.48 5/16-24UNF G8 11.23 11.09 3/8 -16UNC G8 11.34 11.22 3/8 -24UNF G9 11.5 11.36 7/16-14UNC G7 11.58 11.47 7/16-20UNF G10 13.14 12.98 1/2 -13UNC 推薦 推薦下孔徑(mm) 精度 Max Min G8 13.59 13.48 G10 15.14 14.97 G9 15.34 15.22 G8 15.59 15.48 G11 16.93 16.73 G10 17.35 17.35 G11 18.92 18.72 G10 19.35 19.22 G5 1.45 1.39 G5 1.76 1.68 G5 1.77 1.70 G4 2.04 1.96 G4 2.06 1.98 G4 2.35 2.25 G4 2.37 2.29 G5 2.64 2.54 G5 2.68 2.59 G5 2.97 2.87 G5 2.99 2.90 G5 3.22 3.11 G5 3.29 3.19 G6 3.89 3.78 G5 3.91 3.81 G6 4.44 4.30 G6 4.53 4.44 G6 5.07 4.96 G6 5.13 5.03 G7 5.86 5.73 G7 6 5.91 G7 7.38 7.23 G7 7.53 7.42 G7 8.89 8.72 G7 9.1 8.99 G8 10.4 10.02 G8 10.62 10.48 G8 11.92 11.70
G7 G7 G7 G7 G7 G8 G8 G9 G7 G10 G9
7.59 7.7 9.34 9.49 9.59 11.23 11.34 11.5 11.58 13.14 13.35
7.48 7.62 9.22 9.35 9.48 11.09 11.22 11.36 11.47 12.98 13.22
YAMAWA
無屑絲攻攻牙後內徑. 無屑絲攻攻牙後內徑.喫合率計算 無屑絲攻攻牙後內徑
尺 寸 尺寸径
M4x0.7 ※ ▼ 請從這裡選尺寸。 （単位:mm）
D(外径） P（牙距) 4 0.70
有効径 公差 0.118
內螺紋精度公差與喫合率規範 内径 max喫合 min喫合率 内径max 内径min 公差 率(%) (%) 3.422 3.242 0.180 76 100
無屑絲攻下孔徑參照表 無屑絲攻下孔徑參照表
螺絲攻 使用精度 Ｇ級 6
內螺紋 下孔徑 3.40
尺寸 M1 X0.25 M1.2X0.25 M1.4X0.3 M1.6X0.35 M1.7X0.35 M1.8X0.35 M2 X0.4 M2 X0.25 M2.2X0.45 M2.3X0.4 M2.5X0.45 M2.5X0.35 M2.6X0.45 M3 X0.5 M3 X0.35 M3.5X0.6 M3.5X0.35 M4 X0.7 M4 X0.5 M5 X0.8 M5 X0.5 M6 X1 M6 X0.75 M7 X1 M7 X0.75 M8 X1.25 M8 X1 M8 X0.75 M10 X1.5 M10 X1.25 M10 X1 M12 X1.75 M12 X1.5 M12 X1.25 M12 X1 M14 X2
※請輸入使用螺絲 攻 ※請參照右表輸入下孔徑尺 之精度等級數字。 寸。
予算内径值(mm) 予算喫合率值 （％）
2.744 165.7
M8 X1 M8 X0.75 M10 X1.5 M10 X1.25 M10 X1 M12 X1.75 M12 X1.5 M12 X1.25 M12 X1 M14 X2 M14 X1.5
No.12-28UNF 1/4 -20UNC 1/4 -28UNF 5/16-18UNC 5/16-24UNF 3/8 -16UNC 3/8 -24UNF 7/16-14UNC 7/16-20UNF 1/2 -13UNC 1/2 -20UNF
G6 G7 G7 G7 G7 G7 G7 G8 G8 G8 G8