... Flangle 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, pan ... Square, H.W.F undercut, H.W.H, serration, flower head and othersPlating: plain, yellow zinc, zinc, black phosphated, grey phosphated ... , and we also pass the BV inspection Hex Flangle Head Self Tapping Screw