Self Drilling Screws Counter Sunk Head (CSK) Zinc Plated #8x1-1/2 (4.2x38mm), made in Taiwan, are reliable fasteners designed for quick and efficient installation without pre-drilling. Made from high-quality steel with a zinc-plated coating, they provide strong corrosion resistance and long-lasting durability. The countersunk head allows a clean, flush finish, making them suitable for metal, sheet metal, and general construction applications. Packed in 450 pieces, these screws are ideal for professional and industrial use where strength and neat finishing are essential.