Name: Hexagon Socket BoltMaterial: 304 Stainless SteelStandard: GBSize: M1.4 M1.6 M2 M2.5 M3 M4 M5 M6 M8 M10 M12 M14 M16 M20For example: M1.4x3 (thread diameter 1.4mm, length 3mm)Excluding head length