allen screw

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An Allen screw, also known as a hex bolt or hex cap screw, is a type of fastener that has a hexagonal-shaped recess at the top for applying torque using an Allen wrench or hex key. These screws are commonly used in applications requiring a strong and secure connection, such as bicycles, furniture assembly, and machinery. The hexagonal shape provides increased grip and prevents slipping while tightening, ensuring a reliable hold.