Rivet Nut types: flat head ,countersunk head, round body, hex body, open end, closed end, body with ribben, ... , ship, electron and other fittings of industrial products. types: flat head ,countersunk head, round body, hex body, open end, closed end, body with ... ,M12, inch: 1/2,3/8,1/4,5/32 3/16,5/16. material: steel, stainless steel, brass,aluminium. round head Rivet Nut