wafer head self tapping screws 1)Material: carbon steel, stainless steel 2)size:2.9-6.3, 6.5-150 3)standard: Din, ISO, JIS wafer head self tapping screws4)finish: YZ,WZ,plain, black, Ni5)Packing: carton/pallet, small box/carton/pallet6)wafer head self tapping screws wafer head self tapping screws