... carbon steel) Stainless steel, Aluminum alloy,Surface Treatment: Chrome plating, Silver plating, Zinc plating, Nickel plating, Tin-plating, Passivate, Oxidation, Phosphorization, Radiant Plated,Process: Heading, Threading ... , Angle-cutting/Slotting, Heat treatment, Plating, Anti-slipping patchCategory: 1. by components Bolts, Screw bolts/Studs ...