Threaded rivet nuts are made from aluminum, brass, steel or stainless steel and can be used instead of tapped holes, weld nuts, rivets and self-drilling or tapping screws. Installed from the accessible "front" side of the workpiece, rivet nuts provide strong, permanent metal threads in metal or plastic sheets as thin as 0.02 inch. Rivet nuts do not require additional hardware beyond a mating screw.