A Socket Head Cap Screw (Allen Cap Screw) is a precision-engineered fastener with a cylindrical head and a recessed hexagonal drive. It is designed to be tightened or loosened using a hex (Allen) key, offering a clean and streamlined appearance. These screws are typically made from high-strength materials like carbon steel, stainless steel, or alloy steel, ensuring durability and resistance to wear. ... Commonly used in machinery, automotive, and structural assemblies, socket head cap screws are ideal for applications requiring high torque, tight tolerances, and a flush finish. Their compact head design makes them perfect for use in confined spaces.