HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 1/4"-28 Thread Size
The HELI-COIL Helical Insert is a free-running tanged tang style insert with a 1/4"-28 thread size, right-hand orientation, and fine thread pitch. Made from 18-8 metal with a dry film lubricant, it offers a tensile…
SKU 3G-OTH-599199
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Product Description
The HELI-COIL Helical Insert is a free-running tanged tang style insert with a 1/4"-28 thread size, right-hand orientation, and fine thread pitch. Made from 18-8 metal with a dry film lubricant, it offers a tensile strength range of 200,000 to 250,000 psi. Supplied in a 100-piece pack (MPN A1191-4CNW375), this inch-series insert is designed for thread repair or reinforcement in metal applications.
Frequently Asked Questions
What is a HELI-COIL helical insert used for?
A HELI-COIL helical insert is used to repair or reinforce internal threads in metal applications. This free-running tanged tang style insert, with a 1/4"-28 fine thread, restores damaged threads or strengthens new ones, providing a durable stainless steel thread surface.
What are the specifications of the HELI-COIL A1191-4CNW375?
The HELI-COIL A1191-4CNW375 is a free-running tanged helical insert with a 1/4"-28 thread size, right-hand orientation, and fine pitch. Made from 18-8 stainless steel with dry film lubricant, it offers tensile strength of 200,000 to 250,000 psi. Supplied in a 100-piece pack.
Where to buy HELI-COIL helical inserts worldwide?
3G Electric supplies HELI-COIL helical inserts worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source and deliver genuine HELI-COIL products like the A1191-4CNW375 to any location, ensuring compliance and timely delivery.
How to install a HELI-COIL tanged helical insert?
To install a HELI-COIL tanged helical insert, drill out the damaged thread to the specified tap drill size, tap the hole with the correct HELI-COIL tap, then use the installation tool to wind the insert into the threaded hole. Break off the tang after installation for a permanent thread.
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3G Electric supplies HELI-COIL free-running tanged helical inserts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.









