Helical Insert: The Coiled Threaded Insert

The helical insert is the only type of threaded insert whose making consists of a coiled wire. These are also called as screw thread insert or Heli Coil www.tappexinserts.com. Tongs or pliers have to be used to install these inserts. The coiled insert has a free piece pointing out from the coil which is held by the pliers to install, and discarded later.