HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, 1 1/8"-7 Thread Size
The HELI-COIL Thread Repair Kit (MPN 5521-18) is a tanged tang style insert and tool kit for repairing damaged threads in metal. It includes free-running, 18-8 stainless steel helical inserts with a 1 1/8"-7 coarse…
SKU 3G-OTH-527880
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Product Description
The HELI-COIL Thread Repair Kit (MPN 5521-18) is a tanged tang style insert and tool kit for repairing damaged threads in metal. It includes free-running, 18-8 stainless steel helical inserts with a 1 1/8"-7 coarse thread size and right-hand direction, plus an STI tap of the same size. This inch-system kit is designed for metal substrates and is supplied by 3G Electric, a global industrial solutions provider that interprets customer demand and delivers genuine equipment across 14 departments — with specialist depth in combustion, pumps and controls as an authorised distributor.
Frequently Asked Questions
What is a HELI-COIL Thread Repair Kit used for?
A HELI-COIL Thread Repair Kit restores damaged internal threads in metal components. It uses 18-8 stainless steel helical inserts to create strong, wear-resistant threads, commonly applied in automotive, industrial machinery, and equipment maintenance.
What are the specifications of the HELI-COIL 5521-18 kit?
The HELI-COIL 5521-18 kit includes free-running, tanged tang style helical inserts with a 1 1/8"-7 coarse thread size, right-hand direction, and 18-8 stainless steel grade. It comes with an STI tap of the same size and is designed for metal substrates in the inch system.
Where to buy HELI-COIL thread repair kits worldwide?
3G Electric supplies HELI-COIL thread repair kits worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source genuine HELI-COIL products and deliver them to your location, ensuring you get the correct kit for your application.
How to install a HELI-COIL thread insert?
To install a HELI-COIL insert, drill out the damaged thread to the specified size, tap the hole with the included STI tap, then use the installation tool to wind the insert into the new thread. Break off the tang after installation for a permanent, reusable thread repair.
Used in
Common applications for HELI-COILHELI-COIL Products
3G Electric supplies HELI-COIL insert & tool kits. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
