stainless steel spring nut: 1.Material:SS304/SS316;mild steel; 2.Surface:polished;galvanized; 3.Good price and good ... or 316 spring nut;(Size: M6,M8,M10,M12,1/4",5/16",3/8",1/2");4.Competitive price and good ... quality;5.OEM service available;6.Packing:200 PCS/carton;7.Size:M6* ... ,M12*8mm,M12*9.1mm,M12*11.9mm,1/4",3/8",5/16",1/2"; M6(1/4") SS304/SS316 spring nut