Helical insert is made of coiled wire. Another common name is screw thread insert (STI), many users call them all by the brand name and trademark Heli-coil.
The insert is inserted into a tapped hole larger than the required finished size of thread.
Used for repairing damaged threads or to give weaker materials greater threaded strength. Our stock coils are manufactured from 304 Stainless Steel
Insert withstand temperatures ranging from -160°C to +420°C with standing surges up to 500°C.