Drywall screw:philip bugle head black, black phosphate, white or yellow zinc plated accorded with BS, DIN, ANSI standard. Product Description: ... screw Drywall screw philip bugle head black, black phosphate, white or yellow zinc plated accorded with BS, DIN, ANSI standard.Material: C1022 ... , FINE Plating: GREY PHOSPHATED, BLACK PHOSPHATED, BLACK OXIDE, ZINC PLATED, YELLOW ZINC.