Helical Inserts

helical insert Helical Inserts are inserts made of coiled wire. These are also referred to as Screw Thread Inserts (STI).
Benefits of Helical Inserts
  • Helical Locking Inserts provide an exclusive, resilient internal locking thread that grips the bolt and prevents it from loosening under vibration or impact.
  • Helical Locking Inserts permit repeated assembly and disassembly and will not relax their grip on the screw even in tough metals such as titanium, cast iron, alloy steel, etc.
Helical Military and Aerospace Standard Parts
Helical inserts and tooling comply with the following standards and Specifications:
  • MS122076; NASM122076; NASM122275. Insert, corrosion resistant Helical Coil Fine Thread (Inch Series)
  • MS21209, NASM21209. Insert Screw Thread – Self Locking (Inch Series)
  • MA3279. Insert, Screw Thread, Helical Coil (Metric Series), Screw-Locking
Aircraft Fasteners are authorized distributors for the premier manufacturers of these products, including SPS, KATO and Acme.

Contact us and let us help you with all of your helical insert needs. 
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