Stainless Steel Rivet Nut specification:M3 ,M4 ,M5, M6, M8 ,M10 ,M12, inch: 1/2,3/8,1/4,5/32 3/16 ... ,5/16. Stainless Steel Rivet Nut we use cold forged ... . types: flat head ,countersunk head, round body, hex body, open end, closed end, body with ribben, body with groove and ... M4 ,M5, M6, M8 ,M10 ,M12, inch: 1/2,3/8,1/4,5/32 3/16,5/16. material: stainless steel