Nuts are a common type of fastener, classified as a mechanical connector, widely used in fields such as mechanical manufacturing. A nut is composed of a hollow cylindrical body and an internal threaded rim that corresponds to the screw thread. It connects to another corresponding part through the rotation of the screw, achieving the effect of fixation. Therefore, nuts are part of the fastener category, serving the functions of fixing, connecting, and supporting. They are extensively used in various industries such as automotive, railway, aviation, shipping, electronics, appliances, construction, and furniture.