Rivet nut, also known as pull rivet nut and pull cap, is used in the fastening field of various metal plates, pipes and other manufacturing industries. It is widely used in the assembly of electromechanical and light industrial products such as automobile, aviation, railway, refrigeration, elevator, switch, instrument, furniture and decoration. It is developed to solve the shortcomings of thin metal sheet and thin pipe, such as easy melting of welding nuts, easy welding deformation of base materials, easy sliding of tapping internal threads, etc. it does not need tapping internal threads, welding nuts, firm riveting, high efficiency and convenient use.