Nuts are a common type of fastener, a category of mechanical fastening devices widely used in mechanical manufacturing and other fields. A nut consists of a hollow cylindrical body and an internally threaded collar that corresponds to the screw thread. It connects to another corresponding part by rotating the screw, achieving a fixed effect. Therefore, nuts are part of the fastener family, serving functions of fastening, connecting, and supporting. They are extensively used in various industries such as automotive, rail, aviation, shipping, electronics, appliances, construction, and furniture.