... : SS304 or SS316;carbon steel 2.Surface:polished;galvanized 3.Good price and quality Detailed Product DescriptionMetal stamping part/Fastener:Stainless Steel ... .Surface treament: polished,galvanized,hot dipped,nickel plating;3.Stainless Steel 304 or 316 spring nut;(Size: 1/4",3/8",5/16",1 ... /2",M6,M8,M10,M12);4.Competitive price and good quality;5.OEM service ...