Free Running Inserts


Item Code: L1C01
Free running thread inserts are ideal for thread repair and thread reinforcement.

BaerCoil® thread inserts are made from austenitic chromium-nickel steel (stainless steel AISI 304 with a material tensile strength of at least 1400 N/mm²). In production the wire is swaged in cold-form to a rhombic cross-section, which ensures performance and maximum space utilization. With BaerCoil® thread inserts you achieve a better thread connection in regard to wear resistance, thread abrasion, surface finish, corrosion- and heat resistance than with any other single screw connection.


  • Greater in diameter than the tapped hole.
  • The diameter of the leading coil reduces due to the torque applied to the tang during assembly to allow it to enter the tapped thread
  • The coils then expands with a spring-like action anchoring the insert permanently in place against the tapped hole.
  • The helical insert automatically adjusts itself, radially and axially, to any expansion or contraction of the parent material.
  • No staking, locking, swaging, keying, nor interference fit is required to retain helical thread inserts
  • Eliminates stress concentration in parent material.​
  • Available in both, metric and inch series
    • ​​M1.5 to M30
    • UNC: 2-56 to 1″
    • BSW: 3/16 to 1″
    • UNF: 6-40 to 1″
  • Fine pitch inserts available
  • BSP and NPT available on request

Download Catalogue of Baercoil FR Inserts

The default material is AISI 304 although Baercoil thread inserts can also be manufactured in other materials. See the materials guide below.

Download Catalogue of Baercoil BRONZE inserts

Download Catalogue of Baercoil AISI-316 Grade inserts


Item Code: L5C10
BaerCoil thread inserts are also available in the form of thread repair kits to enable the repair of damaged threads. The Kits come complete with the correct drill bit, tap and inserting tools required to repair the damaged threads. A wide range of thread repair kits for all your damaged thread problems available in ready stock. In machinery maintenance, this is the ultimate indispensable partner for thread repair.


  • All the tools required for thread repair are available in one handy kit
  • Rejected parts can be saved while maintaining the original size
  • Expensive replacement of components is thus avoided
  • Thread is strengthened in its pull out and corrosion resistance​
  • Available in both, metric and inch series
    • ​​M2 to M24
    • UNC: 2-56 to 1″
    • UNF: 6-40 to 1″
  • Fine pitch inserts available
  • BSP and NPT available on request
  • Also available as workshop kits, which contain a range of sizes in one kit.

Download Baercoil-Workshop-Kit Catalogue

For Self Tapping Thread Repair, see also BaerFix Self Tapping Inserts.