screw,Various Surface Coating Treatments (Various Surface Coating Treatments)
Various surface coating treatments include:Zinc-plated(white, black, colorful), Chrome-plated, Nichel-plated, Copper-plated, Silvered, Dacromet, Various Ruspect, Phosphorized (black), plastic coating, mechanically galvanized, electrophoretic coating,... - Update: 2008-05-20