... Head Self Tapping Screw with Rupert Plating Way, Made of Carbon Steel Head type: CSK/flat head, truss head, trumpet head, wafer head, pan framing head, pan wafer head, hexagon head ... zinc, black oxide, dacrotized, ruspert, xylanPacking: in bulk, standard packing for exportThey have good quality, and reasonable priceAccept small ... , and we also pass the BV inspection Hex Flangle Head Self Tapping Screw