... Steel 304 or 316 channel spring nut:1.Material:stainless steel 304 or 316;carbon steel;2.Surface treament: polished,galvanized,hot dipped ... ;3.Stainless Steel 304 or 316 spring nut;(Size: 1/4",3/8",5/16",1/2",M6,M8,M10,M12);4.Competitive price ... in time *Always competitive pricing*ISO9001:2000 Certified galvanized spring nut(M6,M8,M10,M12,1/4",3/8",1/2",5/16")