... 4.Finish:plain,zinc plating, passivate... Feature:5mm bolt steel white galvanized A.Product specifications1.Bolt standard: DIN912, ANSI B18.3 ... .9 Grade steel, 12.9 grade, 18-8 stainless steel, brass CuZn3.Surface Finish:natural colour, polishing, nickel plated, chromated, zinc ... things free of charges under normal conditions. , 5mm bolt steel white galvanized