... Nut material: steel, stainless steel, brass,aluminium. Surface treat: white zinc (CR+3), yellow Zinc(CR+6). M8 Rivet Nutwe ... , ship, electron and other fittings of industrial products. types: flat head ,countersunk head, round body, hex body, open end, closed end, body ... material: steel, stainless steel, brass,aluminium. Surface treat: white zinc (CR+3), yellow Zinc(CR+6). M8 flat head round Rivet Nut