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A hex nut is a type of fastener used to secure bolts, screws, and other threaded objects in place. It is a small, six-sided nut with an internal threaded hole, allowing it to be screwed onto a corresponding threaded shaft. The term "hex" refers to its hexagonal shape, which provides practical advantages over other nut designs.

The most common type of hex nut is the standard nut, with evenly spaced threads and a uniform thickness throughout. It is essential to match the size of the hex nut with the corresponding bolt or screw to ensure a proper fit and optimal performance. Hex nuts are available in various materials, such as steel, stainless steel, brass, and nylon, each suitable for specific applications based on factors like strength, corrosion resistance, and cost considerations.

The hex nut's six-sided shape allows for easy tightening and loosening using common tools like wrenches or socket sets. This design provides a secure grip and prevents slipping, making it well-suited for applications where a reliable and tight fastening is necessary.

Hex nuts are widely used in various industries, including construction, automotive, machinery, and electronics, among others. They are a fundamental component in assembling structures, equipment, and devices, ensuring that parts stay firmly connected and function properly. Whether in heavy-duty industrial settings or everyday household repairs, hex nuts play a crucial role in the world of fasteners.