Threaded fasteners are mechanical devices used to join two or more objects together. They typically consist of a shaft with helical grooves, known as threads, which allow them to be screwed into a corresponding hole or nut. Common types of threaded fasteners include screws, bolts, and nuts, each designed for specific applications. These fasteners provide strong connections and can be easily removed or adjusted, making them versatile in various industries, including construction and manufacturing. The design of threaded fasteners ensures that they can withstand tension and shear forces, contributing to the overall stability of assembled structures.