... Steel Specification:M6,M8,M10 Rivet nut (falt head,round body)we use cold forged technique, not only ... fittings of industrial products. types: flat head ,countersunk head, round body, hex body, open end, closed end, body ... so on . also we can produce according to customer's drawing. specification:M3 ,M4 ,M5, M6, M8 ,M10 ,M12 ... : steel, stainless steel, brass,aluminium. stainless steel round rivet nut