Introduction to Socket Head Cap Screws and Bolt GradesSocket head cap screws, commonly referred to as Allen bolts or hex socket screws, are among the most versatile and widely used fasteners in industrial applications. Their distinctive cylindrical head with an internal hexagonal drive provides exce

The Origin of the Name: From Brand to Generic TermThe common designation of Socket Head Cap Screws as "Allen Screws" traces back to early 20th century American industrial history. This terminology originates from the Allen Manufacturing Company - the Hartford, Connecticut-based enterprise that first

Socket head cap screws (commonly called Allen screws) are essential fasteners in machinery, automotive, and industrial applications. Their hexagonal socket design provides excellent torque transfer, but when damaged, removing a stripped Allen screw or socket head cap screw can be challenging.

As a leading hex bolt manufacturer in China, Panfa Fastener has become a trusted fastener supplier for domestic and international customers through years of production experience and technological expertise. We strictly adhere to international standards and Chinese national standards, providing high

Bolts are among the most essential fasteners in construction, manufacturing, automotive, and countless other industries. Choosing the right bolt type ensures structural integrity, safety, and performance. This guide explores common bolt classifications, their applications, and how Panda Fastener provides high-quality solutions for your fastener needs.

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