Features Phillips drive and countersunk head. The tapered head can be embedded into the material surface for a flat finish. Self-tapping thread enables the screw to cut its own thread directly into thin metal, wood, plastic without pre-tapped holes. Materials: carbon steel, stainless steel. Surface treatments include zinc plating, black oxide. Metric sizes available. Widely used in sheet metal, wooden products, electrical casings, cabinet assembly and decoration projects.