Fastener

A fastener is a hardware device used to mechanically join two or more parts together. Common fasteners include bolts, screws, nuts, washers, studs, rivets, and pins. Most threaded fasteners work by engaging matching threads in a nut or tapped hole and creating clamp load when tightened, which holds the parts together through friction and compression. Fasteners are used across construction, manufacturing, automotive, aerospace, and maintenance because they provide a reliable, standardized way to assemble components.

Fasteners are selected based on factors like size and thread type, strength grade or property class, material, finish or coating, and the demands of the application. Some joints need high preload and vibration resistance, while others prioritize corrosion resistance, easy removal, or compatibility with softer materials. Using the correct fastener helps ensure proper fit, safe load capacity, and long service life, and it also makes maintenance and replacement more predictable because standardized fasteners can be sourced consistently.