Allen bolts, also known as hex socket head bolts or socket head cap screws, are a type of fastener featuring a cylindrical head with a hexagonal recess that requires an Allen key (hex key) for tightening or loosening. These bolts are widely used in machinery, automotive components, electronics, and industrial assemblies due to their compact head design and high torque-bearing capability. Manufactured from materials such as stainless steel, alloy steel, and carbon steel, Allen bolts offer excellent strength, corrosion resistance, and durability. Their flush-fitting head allows them to be used in tight spaces where traditional wrenches cannot reach. They are ideal for applications where a clean and precise finish is needed, and where fastening strength is critical. Allen bolts are available in various sizes, thread types (coarse and fine), and finishes like black oxide, zinc plating, or galvanized coating, depending on the application’s requirements. These bolts provide a secure hold, reducing the risk of loosening due to vibration.