Socket Button Head Screw is specifically designed to be used for high strength applications with complete reliability & durability. It has unique dome-shaped head with hexagonal socket. This screw is not known to become loose on its own due to high impact, load, or vibration. It is made of superior quality steel alloy and has black oxide surface coating which enhances durability & resists corrosion. Socket Button Head Screw provides larger bearing surface and is best suited where material is too thin to countersink.