Free Running Coil Thread Insert

Free Running Coil Thread Insert

Our Helisert Stainless Steel Wire Thread Inserts are formed from high quality stainless steel wire with a diamond shaped cross section, wound to the shape of a spring thread. Once the wire is wound into a helical coil and installed into a tapped hole, Metal Wire Thread Insert provides a permanent and wear resistant thread in the parent material that is generally stronger than the original thread.


The thread size is from M2-M42 (Also for M1.2 and M1.6 to M64 and M72).
The length is from 1D to 3D (Also for 0.5D to 5D)

Company Overview

Shenyang Liming Mechanical Component(Helisert Inserts), is the flagship company in China for thread inserts. We supplied to Chinese military and aerospace since 1998 and our founder start to analyze thread inserts since 1965, at Shenyang Liming Group.

After more than 25 years` developing, our HELISERT, including Wire Thread Insert, Keylocking Insert, Self-tapping Insert and other type of thread insert, has already achieved all-automatic production and keep supplying to Chinese military, aerospace, automobile and exporting.

Size Range:

Metric sizes: M2 to M42 (M1.2, M1.6 and larger sizes on request)

Inch Unified: #2-56 to 1 1/2-6（Other sizes on request）

BSF, BSW and pipe thread sizes on request.

Material:                                      

304 Stainless Steel                                         

316 Stainless Steel   

Inconel X-750                

Nitronic 60/ Nimonic 90

Bronze/ Aluminum   

Finishes& Coating:

Dye Coating(Green, Red, Blue. Etc.)
Cadmium Plating 
Silver Plating
Dry Film Lubricants