Nuts, a common type of fastener, belong to a category of mechanical connectors widely used in fields such as mechanical manufacturing. Nuts are composed of a hollow cylindrical body and an internal threaded nut, with the internal threads corresponding to those of a bolt. They connect to another corresponding part by rotating the bolt, achieving a fixed effect. Therefore, nuts are part of the fastener family, serving as a fixing, connecting, and supporting element. They are extensively used in various industries including automotive, railway, aviation, shipping, electronics, appliances, construction, and furniture.