... or SS316;carbon steel 2.Surface:polished;galvanized 3.Good price and quality Detailed Product DescriptionMetal stamping part/Fastener: ... spring nut;(Size: 1/4",3/8",5/16",1/2",M6,M8,M10,M12);4.Competitive price and good quality;5.OEM ... physical samples from you and we will quote you competitive price asap. *Material: carbon steel*Finish: zinc plated, ... spring nut(M6,M8,M10,M12,1/4",3/8",1/2",5/16")