... nut: 1.Material:Carbon Steel; 2.Surface:Hot Dipped Galvanized; 3.Good price and quality; Metal stamping part/channel ... Surface treament:nickel plating,,zinc plating,galvanized,hot dipped and so on;3.Stainless steel 304 or 316 or carbon ... ,M12*8mm,M12*9.1mm,M12*11.9mm,1/4",3/8",5/16",1/2" )We hope to ... will quote you competitive price asap. hot dipped galvanized spring nut(M6,M8,M10,M12,1/4",3/8",1/2")