Wire thread inserts are helically coiled fastening devices that provide permanent, wear-resistant screw threads that exceed the strength of most parent material; the inserts are designed to protect tapped holes against failures due to stripping, seizing, corrosion, and wear. They are available in two styles: Tanged and Tangless®.
Tangless® inserts are a helically-coiled, bi-directional, wire design; that install using a drive notch located at either end of the coil insert instead of a tang located at one end of the inserts. After installing a tanged inserts you have to go back and break off the tang, this process is eliminated with Tangless inserts. In blind hole applications the tang must be retrieved, this process is also eliminated with Tangless inserts.
