Heli-Coil^® 8-Pitch Screw Thread Inserts

Heli-Coil® 8-Pitch inserts are a unique series of screw thread inserts designed for 8-pitch threaded holes. Compared with other methods, thread repair with Heli-Coil® 8-Pitch inserts is fast and economical, providing better-than-original threads and saving expensive parts with a minimum of downtime.

The wire cross section of Heli-Coil® 8-pitch inserts is precisely engineered to reduce the pitch diameter of a standard 8-pitch tapped thread by exactly 1/8" which allows Heli-Coil® assemblies to be made in normal 1/8" thread-size increments. As an example, if a 1-1/4"-8 thread is damaged, it can be readily repaired by tapping with the next 1/8" larger standard 8-pitch tap—in this case, 1-3/8"-8. No special taps are ever needed. When the insert is installed, the resulting assembly provides a permanently repaired thread to the original 1-1/4"-8 size.

Heli-Coil® 8-Pitch inserts can be used in existing bosses and flanges where repairs are impossible with other types of inserts or solid bushings. By using Heli-Coil® 8-Pitch inserts you can save valuable parts that would otherwise become scrap.