Hex Nut 2 Types

[Materials] Steel S45C, Equivalent to SWCH, Equivalent to stainless steel SUS304, SUS316, SUS316L, Brass
[Surface treatment] None, trivalent chromate, bright chromate plating, zinc plating, chromate plating, nickel plating, chrome plating, Parkerizing, painting, coating, silver/copper/tin plating