Why They Are Used
PlugNuts® are hardened, threaded inserts designed to be pressed into ductile materials to assure good fastening characteristics for a part or product. First, cost is low--installation is inexpensive. Once inserted, the PlugNut® becomes a "self-clinching" preplaced nut; ideal for use in blind, hard to reach locations and to improve fasten-ability for thin or soft materials such as steel, brass and aluminum.
How They Work
Each PlugNut® is made with a tapered knurled projection -- the large end of which is greater in diameter than the hole in which the nut will be used. An annular groove separates the top of the projection from the underside of the head of the nut. When the nut is pressed into a mating hole, the wall material of the hole is radially displaced in an outward direction. Displaced hole material flows into the knurls and groove to clinch the nut securely in place. This is accomplished without affecting the flatness of component product material.