Nuts are a common type of fastener, classified as a mechanical fastening component, widely used in mechanical manufacturing and other fields. A nut is composed of a hollow cylindrical body and an internal threaded ring that corresponds to the screw thread. It connects to another mating part by rotating the screw, achieving a fixed effect. Therefore, nuts are part of the fastener family, serving the functions of fastening, connecting, and supporting. They are extensively used in various industries such as automotive, rail, aviation, marine, electronics, electrical appliances, construction, and furniture.