螺纹底孔对照表

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1、螺纹底孔直径 公制粗牙螺纹 螺纹代号 钻头直径 HSS 硬质合金 M2 X0.4 1.6 1.65 M3 X0.5 2.5 2.55 M4 X0.7 3.3 3.4 M5 X0.8 4.2 4.3 M6 X1.0 5.0 5.1 M8 X1.25 6.8 6.9 M10 X1.5 8.5 8.7 M12 X1.75 10.3 10.5 M14 X2.0 12.0 12.2 M16 X2.0 14.0 14.2 M18 X2.5 15.5 15.7 M20 X2.5 17.5 17.7 M24 X3.0 21.

2、0 M30 X3.5 26.5 M36 X4.0 32.0 M42 X4.5 37.5 M45 X4.5 40.5 M48 X5.0 43.0 细牙螺纹 螺纹代号 钻头直径 铝 硬质合金 M2 X0.25 1.75 1.75 M3 X0.35 2.7 2.7 M4 X0.5 3.5 3.55 M5 X0.5 4.5 4.55 M6 X0.75 6.3 6.35 M8 X1.0 7 7.1 M8 X0.75 7.3 7.35 M10 X1.0 9 9.1 M10 X1.25 8.8 8

3、.9 M10 X0.75 9.3 9.35 M12 X1.5 10.5 10.7 M12 X1.25 10.8 10.9 M12 X1.0 11 11.1 M14 X1.5 12.5 12.7 M14 X1.0 13.0 13.1 M16 X1.5 14.5 14.7 M16 X1.0 15.0 15.1 M18 X1.5 16.5 16.7 M18 X1.0 17 17.1 M20 X2.0 18 18.3 M20 X1.5 18.5 18.7 M20 X1.0 19 19.1 M24 X2.0 22.0

4、 M24 X1.5 22.5 M24 X1.0 23.0 M30 X3 27 M30 X2 28 M30 X1.5 28.5 M30 X1.5 29 M36 X3.0 33.0 M36 X2 34.0 M36 X1.5 34.5 M42 X4 38 M42 X3 39 M42 X2 40 M42 X1.5 40.5 M45 X4 41 M45 X3 42 M45 X2 43 M45 X1.5 43.5 螺纹螺距（粗牙、细牙）对照表 螺纹 粗牙 细牙 M1 0

5、.25 0.2 M1.1 0.25 0.2 M1.6 0.35 0.2 M2 0.4 0.25 M2.5 0.45 0.35 M3 0.5 0.35 M4 0.7 0.5 M5 0.8 0.5 M6 1 0.75, (0.5) M8 1.25 1, 0.75, (0.5) M10 1.5 1.25, 1, 0.75, (0.5) M12 1.75 1.5, 1.25, 1, (0.75), (0.5) (M14) 2 1.5, 1.25, 1, (0.75), (0.

6、5) M16 2 1.5, 1.25, 1, (0.75), (0.5) (M18) 2.5 2, 1.5, 1.25, 1, (0.75), (0.5) M20 2.5 2, 1.5, 1.25, 1, (0.75), (0.5) (M22) 2.5 2, 1.5, 1.25, 1, (0.75), (0.5) M24 3 2, 1.5, 1, (0.75) (M27) 3 2, 1.5, 1, (0.75) M30 3.5 3, 2, 1.5, 1, (0.75) (

7、M33) 3.5 (3), 2, 1.5, 1, (0.75) M36 4 3, 2, 1.5, (1) (M39) 4 3, 2, 1.5, (1) M42 4.5 (4), 3, 2, 1.5, (1) (M45) 4.5 (4), 3, 2, 1.5, (1) M48 5 (4), 3, 2, 1.5, (1) (M52) 5 (4), 3, 2, 1.5, (1) M56 5.5 4, 3, 2, 1.5, (1) (M60)

8、 5.5 4, 3, 2, 1.5, (1) M64 6 4, 3, 2, 1.5, (1) (M68) 6 4, 3, 2, 1.5, (1) M72 6 4, 3, 2, 1.5, (1) (M76) 6 4, 3, 2, 1.5, (1) M80 6 4, 3, 2, 1.5, (1) 螺纹规格及攻丝底孔对照表 螺纹规格 钻头直径 ① 1.25 M2 X0.4 ①1.6 ① 2.05 M3 X0.5 ①2.5 ①2.9 M4 X0.7

9、 ①3.3 M5 X0.8 ①4.2 M6 X1 ①5 M8 X1.25 ①6.8 M8 X1 ①7 M10 X1.5 ①8.5 M10 X1.25 ①8.8 M12 X1.75 ① 10.2 M12 X1.50 ① 10.5 M12 X1.25 ① 10.8 M14 X2 ①12 M14 X1.5 ① 12.5 M16 X2 ①14 M16 X1.5 ① 14.5 M18 X2.5 ① 15.5 M18 X1.5 ① 16.5 M20 X2.5 ① 17.5 M20 X1.5 ① 18.5 M22 X2.5 ① 19.5 M22 X1.5 ① 20.5 M24 X3 ①21 M24 X2 ①22 M27 X3 ①24 M27 X2 ①25 M30 X3.5 ① 26.5 M33 X3.5 ① 29.3 M36 X4 ① 31.8 M39 X4 ① 34.8 M42 X4.5 ① 37.3