Small countersunk head pull rivet nuts are also divided into two types: smooth surface and vertical pattern. They are riveted in a thin plate with chamfers. After installation, the head surface is parallel to the surface of the thin plate. With the development of society, especially the development and progress of my country's industry, the connection method of sheet metal has undergone a tremendous change. From the initial drilling and tapping to the later use of welding nuts, the mainstream now is to completely replace the rivet nuts. In view of the position of welding nuts in thin plate connections, rivet nuts and rivet studs are also widely used in thin plate connections.
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