Blind rivet nut (rivnut) is a threaded blind fastener. It can be installed from only one side of workpiece. When pulling with rivet gun, the shank deforms and bulges on the back side of thin plate to form firm internal thread. It is widely used on thin sheet metal, aluminium profiles, hollow profiles. It creates reliable female thread without tapping or welding. Materials: carbon steel, stainless steel A2/A4, aluminium; surface: zinc plated, black oxide.