... .Length:5mm-650mm 4.Finish:plain,zinc plating, passivate Feature:hardened steel cap head bolts A.Product specifications1.Bolt standard: DIN912, ANSI ... :8.8 grade, F10T, 10.9 Grade steel, 12.9 grade, 18-8 stainless steel, brass CuZn3.Surface Finish:natural colour, polishing ... deliver the right things free of charges under normal conditions. , hardened steel cap head bolts