- 1 - 螺栓和螺钉通孔尺寸( GB/T 5277-1985) 螺纹规格 d M1 M1.2 M1.4 M1.6 M1.8 M2 M2.5 M3 M3.5 M4 M4.5 M5 M6 M7 M8 螺纹直径 精装配 1.1 1.3 1.5 1.7 2 2.2 2.7 3.2 3.7 4.3 4.8 5.3 6.4 7.4 8.4 中等装配 1.2 1.4 1.6 2 2.1 2.4 3.2 3.4 3.9 4.5 5 5.5 6.6 7.6 9 粗装配 1.3 1.5 1.8 2.2 2.4 2.6 3.7 3.6 4.2 4.8 5.3 5.8 6.6 7.6 10 螺纹规格 d M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36 M39 M42 M45 螺纹直径 精装配 10.5 13 15 17 19 21 23 25 28 3
螺距(t) 内径(d 1) 螺距(t) 内径(d 1) 2 0.4 1.567 2.5 0.45 2.013 3 0.5 2.459 4 0.7 3.242 0.5 3.459 5 0.8 4.134 0.5 4.459 6 1 4.918 0.75 5.188 8 1.25 6.647 1,0.75,0.5 6.918,7.188,7.459 10 1.5 8.376 1.25,1,0.75 8.647,8.918,9.188 12 1.75 10.106 1.5,1.25,1 10.376,10.647,10.918 14 2 11.835 1.5,1 12.376,12.918 16 2 13.835 1.5,1 14.376,14.918 18 2.5 15.294 2,1.5,1 15.835,16.376,16.918 20 2.5 17.294 2,1.5,1 17.835,