... good quality; Metal stamping part/Fastener:Stainless Steel 304 or 316 channel spring nut:1.Material:stainless steel 304 or 316;2.Surface ... dipped galvanized,nickel plating;3.Stainless Steel 304 or 316 spring nut;(Size: M6,M8,M10,M12,1/4",3/8",5 ... ,M12*8mm,M12*9.1mm,M12*11.9mm,1/4",3/8",5/16",1/2"; stainless 304 or 316 channel spring nut