Steel drywall screw Material:steel Treatment:white zinc Head:hexagon head Size: M6*15, M6* ... , chipboard screw, ball screw, hex head screwbolt screw, bolts and nuts, self drilling screw, self tapping screw, machine screw, furniture screwdrywall ... Delivery time and free communication1) Material: Different kinds of stainless steel, steel, brass or aluminum etc 2) Main equipment: CNC machine, automatic ...