About US

Heli-Coil Inserts have evolved since their inception in the 1930’s and now
include the complete range of both tanged and tangless free running and
screw-locking wire insert systems.

Today Heli-Coil delivers a vast array of high quality inserts and installation tools designed to meet the needs of the industry’s ever demanding designers and manufacturers. Inserts are available in a variety of materials and special coatings. With Heli-Coil threads, tapped holes are strengthened and thread life is dramatically increased.

Heli-Coil Inserts are The Original.



Our strict quality programs ensure that we meet the latest industry standards of ISO/TS 16949:2002, ISO 14001:2004, AS/EN/JISQ9100 Rev C and ISO 9001:2008. A  comprehensive Business Management System elevates our quality levels well above our competitors

HeliCoil Screw Thread Inserts

Heli-Coil inserts are precision formed coils of extremely hard, diamond shaped 304 stainless steel. When installed into an STI tapped hole, they provide permanent conventional 60° internal screw threads.
This assembled insert accommodates any standard bolt or screw as per MIL-S-7742 and AS8879 (UNJ controlled root radius)

Heli-Coil tanged inserts are larger in diameter before installation than the tapped hole. During installation, the inserting tool applies torque to the tang reducing the diameter of the leading coil permitting it to enter the tapped thread. After installation, each high tensile coil of the insert expands outward with a spring-like action permanently anchoring the insert.