Threaded bushings are also called male and female screws and threaded sleeves. Threaded bushings are suitable for various materials, such as plastic, aluminum, cast iron, etc. Threaded bushings have high tensile strength and high torque. In addition to protecting the base material, they can also improve the bonding ability between the bolt and the base material. They can effectively prevent tooth decay, tooth collapse, and tooth slippage. They are easy and fast to install and are not easy to loosen in a vibrating environment.