ferent types of self drilling screw, and then you also can be customized the products that you wanted,if you have the samples or drawings.Place of Origin:Zhejiang, China (Mainland)Brand Name:ZCMaterial:Carbon SteelFinish:Blue Zinc PlateSurface treatment:Heat TreatingType: Nylon hex washer HEADColor:Zinc WhitePacking:CartonItem:China FastenerApplication:BuildingPackaging Details:Small box, carton, pallet, nylon bag, for self drilling screwProduct Descripion1. Grade: C10222. Size: ST5.53. Length：