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An Allen screw, also known as a socket head cap screw or hex socket screw, is a type of fastening device distinguished by its hexagonal socket or recess in the head. This socket is designed to accommodate an Allen wrench (hex key), allowing for torque to be applied to tighten or loosen the screw.
- Head Design: The head of an Allen screw is typically cylindrical with a flat top and a hexagonal socket recessed into it. This design allows for a more compact profile compared to traditional bolts or screws with protruding heads.
- Fastening Mechanism: Allen screws are tightened or loosened using an Allen wrench, which fits snugly into the hexagonal socket. This provides a secure grip and enables efficient application of torque.
- Materials and Applications: Allen screws are commonly made from steel, stainless steel, or other metals, and they are available in various grades and finishes. They are used in a wide range of applications where a strong, secure, and low-profile fastening solution is required.
- Advantages: The use of Allen screws offers several advantages, including:
- Compact head design allows for use in tight spaces or where clearance is limited.
- Provides a more aesthetic appearance compared to traditional fasteners.
- High torque transfer capability due to the hexagonal socket design.
- Less likely to strip compared to screws with other drive types.
- Variants: Allen screws come in different types such as socket head cap screws (with a cylindrical head), button head screws (with a rounded head), and socket set screws (which do not have a head, used for securing one object within another).
Allen screws are widely used in industries such as manufacturing, automotive, construction, and electronics for their reliability, strength, and ease of use with Allen wrenches.
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