... and bonded neoprene washers to order.Specifications: Head: Hex head, Hex flange head, Pan head, Pan framing head, Flat head, Truss head, Wafer head, Oval headRecess: Phillips, Pozi, Slotted, Torx ... tempering) Zinc plated 3 - 5 my or 5 - 8 my. self drilling screw