Name: 304 stainless steel socket head cap screw half round pan head screw and nut set Material: 304 stainless steel Quantity: 480pcs M2 * 8 20PCS M2 * 12 20PCS M2 * 16 20PCS M2 * 20 20PCS M3 * 8 20PCS M3 * 12 20PCS M3 * 16 20PCS M3 * 20 20PCS M4 * 8 20PCS M4 * 12 20PCS M4 * 16 20PCS M4 * 20 20PCS Nut M2 80PCS M3 80PCS nut Nut M4 80PCS Forced bearing surface: There is sufficient force bearing surface which can be clamped more tightly. Transparent box cover for quick access: All screws and nuts will be packed in a sturdy plastic box. The set comes in a clear storage box by size / type for quick access and protection. Uses: Widely used in household and office electrical appliances, communication equipment, ship assembly and other machinery industries, furniture, automobile and motorcycle maintenance and inventions DIY! It can also be used for storage box fasteners, industrial and construction fasteners. Very suitable for narrow areas where the head needs to be flush or below the surface.