... .Material:carbon steel; 2.Surface:galvanized or zinc plating; 3.Competitive price and good quality; Metal stamping partGalvanized carbon steel ... treament: galvanized,zinc plating,and so on;3.Galvanized steel spring nut;4.Competitive price and good quality;5.OEM service ... 1mm,M12*8mm,M12*9.1mm,M12*11.9mm,1/4",3/8",5/16",1/2";We hope to receive ... price asap. spring nut(M6,M8,M10,M12,1/4",3/8",5/16",1/2")