You are here: Wire Thread Inserts

Recoil helically wound wire thread inserts can be used to strengthen threads, giving applications a longer life. They are rolled from high quality stainless steel wire and cold-drawn into a diamond shaped cross section, formed to the shape of a spring thread. Once the wire is formed into a helical coil insert and installed into a tapped hole, it provides a permanent and wear resistant thread in the parent material that is stronger than the original thread.

The inserts are designed to be greater in diameter than the tapped hole and compress as they are installed. This allows maximum surface contact area with the tapped thread, safely and permanently anchoring the inserts into place. The insert’s compensatory action shares the load over the entire bolt and hole, increasing holding or pull out strength. With a Recoil insert in place, load and stress are more evenly distributed.

Standard inserts are free-running, but screw-locking inserts are also available. Both free-running and screw-locking inserts are available on plastic strips for automated tooling systems.

Recoil inserts can be supplied in other materials such as Inconel, Nimonic 90, Nitronic 60, Phosphor Bronze and type 316 Stainless Steel.


  • Lightweight yet robust design gives superior holding power
  • Quick and simple installation process
  • Extensive stock of METRIC, BSW, UNC, UNF, BSC, BA, BSP and NPT inserts
  • Large variety of materials and coating options
  • Special lengths and diameter pitch combinations available to order
  • A wide range of tooling options available

Common Uses/ Typical Applications:

  • For strengthening of any existing thread
  • Particularly applicable to threads in weaker materials