Formerly Emhart Teknologies & Infastech

Types

Screw thread insert types genereally consist of tanged or tangless, free-running or screw-locking, and both inch and metric sizes. Heli-Coil also manufactures inserts to provide very specific and unique features and benefits, some of which are listed here. 

As an example, oversize and twinsert inserts are designed to correct tapping or assembly errors while serrated spark plug inserts have a serrated top coil to offset into the parent material and operate in high-temperature, high-performance spark plug applications.