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Helicoil 8 TPI UN Inserts and Kits

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.
  • A unique series of screw thread inserts especially designed for 8-pitch threaded holes.
  • Available in 18-8 stainless steel and Inconel X-750.
INSERT MATERIALS:   HELI-COIL 8-Pitch Inserts are available in 18-8 stainless steel and copper-coated Inconel X-750. For most repairs and applications in which temperatures will not exceed 800°F, stainless steel is recommended. When temperatures reach 800 to 1000°F, or when seizure with stainless steel screws or studs must be avoided, Inconel X inserts are recommended. Both materials have a tensile strength of approximately 2000,000 psi.   AVAILABILITY: 8-Pitch Standard (free-running) and Screw-Lock inserts are available in thread sizes 1-1/8″ to 2″, in lengths of 1, 1-1/2 and 2 times the nominal diameter. Other sizes and lengths can be supplied on special order. HELI-COIL 8-Pitch Inserts: • Provide wear-resistant, harder-than-original threads (RC 43-50). • Provide reusable, smoother-than-original threads (8-16 RMS). • Eliminate other costly repair methods. • Save valuable parts that would otherwise have to be scrapped. • Are applicable in existing bosses and flanges where repairs are impossible with other types of inserts or solid bushings  
Helicoil 8 TPI UN Inserts and Kits

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