HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, 7/8"-14 Thread Size
The HELI-COIL Helical Insert is a tanged tang-style screw-locking insert with a 7/8"-14 fine thread, 7/8 in overall length, and a tensile strength of 200,000 to 250,000 psi. Made from 18-8 material, it is compatible…
SKU 3G-OTH-528853
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Product Description
The HELI-COIL Helical Insert is a tanged tang-style screw-locking insert with a 7/8"-14 fine thread, 7/8 in overall length, and a tensile strength of 200,000 to 250,000 psi. Made from 18-8 material, it is compatible with metal and uses a right-hand thread direction. 3G Electric interprets demand and delivers this insert across 14 industrial departments, with specialist depth in combustion, pumps, and controls as an authorised distributor.
Frequently Asked Questions
What is a HELI-COIL helical insert used for?
A HELI-COIL helical insert repairs or reinforces threads in metal, providing a strong, wear-resistant internal thread. This screw-locking tanged style prevents loosening under vibration, making it ideal for automotive, aerospace, and industrial equipment. 3G Electric supplies this insert across 14 industrial departments.
What are the specifications of the HELI-COIL 3591-14CN875 insert?
This HELI-COIL insert has a 7/8"-14 fine thread, 7/8 in overall length, and a tensile strength of 200,000 to 250,000 psi. It is made from 18-8 material, right-hand thread direction, and requires an STI tap size of 7/8"-14. It is compatible with metal substrates.
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 this screw-locking insert to your facility. Contact us for availability and lead time on this 7/8"-14 fine thread insert.
How to install a tanged screw-locking helical insert?
Install a tanged screw-locking helical insert by drilling to the specified STI tap size (7/8"-14), tapping the hole, then winding the insert onto the installation tool. Use the tang to drive the insert fully, then break off the tang. Ensure the insert is below the surface for proper locking action.
Used in
Common applications for HELI-COILHELI-COIL Products
3G Electric supplies HELI-COIL screw-locking tanged helical inserts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.









