螺纹公称直径 螺距 螺纹内径 推荐钻头直径 最大 最小 M2 粗 0.4 1.677 1.567 1.6 细 0.25 1.809 1.729 1.75 M3 粗 0.5 2.599 2.459 2.5 细 0.35 2.721 2.621 2.65 M4 粗 0.7 3.422 3.242 3.3 细 0.5 3.599 3.459 3.5 M5 粗 0.8 4.334 4.134 4.2 细 0.5 4.599 4.459 4.5 M6 粗 1 5.118 4.918 5 细 0.75 5.378 5.118 5.2 M8 粗 1.25 6.887 6.647 6.7 细 1 7.118 6.918 7 0.75 7.378 7.118 7.2 M10 粗 1.5 8.626 8.376 8.5 细 1.25 8.867 8.647 8.7 1 9.118 8.918 9 0.75 9.378 9.118 9.2 M12 粗 1.75 10.386 10.106 10.2 细 1.5 10.626 10.376 10.5 1.25 10.867 10.647 10.7 1 11.118 10.918 11 M16 粗 2 14.135 13.835 13.9 细 1.5 14.626 14.376 14.5 1 15.118 14.918 15 M20 粗 2.5 17.634 17.294 17.4 细 2 18.135 17.835 17.9 1.5 18.626 18.376 18.5 1 19.118 18.918 19 M24 粗 3 21.132 20.752 20.9 细 2 22.135 21.835 21.9 1.5 22.626 22.376 22.5 1 23.118 22.918 23 M27 粗 3 24.132 23.752 23.9 细 2 25.135 24.835 24.9 1.5 25.626 25.376 25.5 1 26.118 25.918 26 M30 粗 3.5 26.631 26.211 26.3 细 3 26.9 26.88 26.7 2 28.135 27.835 27.9 1.5 28.626 28.376 28.5 1 29.118 28.918 29 螺纹公称直径 螺距 螺纹内径 推荐钻头直径 最大 最小 M33 粗 3.5 29.631 29.211 29.3 细 2 31.135 30.835 30.9 1.5 31.626 31.376 31.5 M36 粗 4 32.150 31.670 31.8 细 3 33.132 32.752 32.9 2 34.135 33.835 33.9 1.5 34.626 34.376 34.5 M39 粗 4 35.150 34.670 34.8 细 3 36.132 35.752 35.9 2 37.135 36.835 36.9 1.5 37.626 37.376 37.5 M42 粗 4.5 37.679 37.129 37.3 细 3 39.132 38.752 38.9 2 40.135 39.835 39.9 1.5 40.626 40.376 40.5 M45 粗 4.5 40.679 40.129 40.3 细 3 42.132 41.132 41.9 2 43.135 42.835 42.9 1.5 43.626 43.376 43.5 M48 粗 5 43.118 42.588 42.7 细 3 45.132 44.752 44.85 2 46.135 45.83.5 45.9 1.5 46.626 46.376 46.5
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