T.F.N.
Various type of special fasteners,Ex. Rivet Nut, Blind nut, Nutsert, special rivet and more
This fastener can be used in a wide range of applications and are designed to provide a very efficient and cost-effective method of placing permanent threads in thin sheet materials, Installed from one side, It's perfect for use in metal, fiberglass and rigid plastic which is too thin to tapped threads, it's also provide a neat appearance once in place, the internal threads are ready for a screw or bolt.
4 Easy steps to install blind nut