m12 hexagon bolt din931/din933Product surface treatment: Zinc Clear, Zinc Yellow, Zinc Black, Tin-plating, Nickel-plating, Dacromet, Mechanical Galvanizing, Hot-dip Galvanizing, Dye Blackness, Phosphor Grey, Copper Yellow, etc.Place of Origin:Zhejiang, China (Mainland)Brand Name:ZCMaterial:20MnTiBFinish: blackSurface treatment:Heat TreatingType: HexagonColor: blackPacking:CartonItem:China FastenerApplication:BuildingPackaging Details:Small box, carton, pallet, nylon bag, for self drilling screwP