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Free Running Wire Thread Inserts


Free Running Wire Thread Inserts are produced from precision profiled stainless steel wire with a diamond shape cross section. Once the insert is installed into a tapped hole, it provides a permanent and wear resistant thread in the parent material designed to be stronger than the original thread.

In their free state, Wire Thread Free Running Inserts are greater in diameter than the tapped hole into which they are installed. During installation the torque applied to the tang reduces the diameter of the leading coil and permits it to enter the tapped thread. The coils then expand and the inserts position is permanently maintained by the action of radial pressure against the flanks of the tapped hole.

Butler Fasteners Limited in Nottingham supply Helicoil, Recoil and V-Coil free running wire thread inserts in order to provide our customers with the best price and availability possible.

Helicoil®, Recoil® and V-Coil Free Running Wire Thread Inserts are available in the following thread forms:

  • Metric (Coarse & Fine)
  • Whitworth (BSW, BSF, BSPF, BA)
  • Unified Thread (UNC & UNF)
  • Spark Plug
  • Pipe Thread


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