1、螺纹螺距（粗牙、细牙）对照表螺纹 粗 牙 细 牙M1 0.25 0.2M1.1 0.25 0.2M1.6 0.35 0.2M2 0.4 0.25M2.5 0.45 0.35M3 0.5 0.35M4 0.7 0.5M5 0.8 0.5M6 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), (0.5)M16 2 1.5, 1.25, 1, (0.75), (0.5)(M18) 2.5 2,
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)(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) 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)
