按尺寸分:M1.6, M2, M2.5, M3, M4, M5, M6, M8, M10, M12, M14, M16, M18, M20, M22, M24, M27, M30, M33, M36, M42, M48按头型分:圆柱头,圆头,沉头,六角头,扁圆头,盘头,伞头,T型头,方头,半沉头,蝶形等。基本上就这些了。