... nbzhencheng.com, main have self-drill screw , drywall screw , wood screw , slef tapping screw , machine screw , chipboard screw . Variety of complete ... Blue Zinc PlateSurface treatment:Heat TreatingType: HEX WASHER HEADColor:Zinc WhitePacking:CartonItem:China FastenerApplication:BuildingPackaging ... box, carton, pallet, nylon bag, for self drilling screwProduct Description1. Grade: C10222. Size: ST3 ...