... 5mm-650mm 4.Finish:plain,zinc plating, passivate... Feature: stainless steel 316L Screws A.Product specifications1.Bolt standard: DIN912, ANSI B18 ... 8.8 grade, F10T, 10.9 Grade steel, 12.9 grade, 18-8 stainless steel, brass CuZn3.Surface Finish:natural colour, ... equipment: Hardness test, torque test, salt spary endurance test, mechanical sizes test, ROHS report Mill test certification and etc as per ...