Nuts are a common type of fastener, classified as a mechanical fastening component, widely used in fields such as mechanical manufacturing. A nut is composed of a hollow cylinder and an internal threaded collar that corresponds to the screw thread. It connects to another component by rotating the screw, achieving a fixed effect. Therefore, nuts are part of the fastener category, serving as a means of fixation, connection, and support. They are extensively used in various industries including automotive, rail, aviation, shipping, electronics, appliances, construction, and furniture.