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HELI-COIL Thread Repair Kit: Tanged Tang Style - Insert & Tool Kits
HELI-COILInsert & Tool Kits

HELI-COIL Thread Repair Kit: Tanged Tang Style

The HELI-COIL Thread Repair Kit (MPN 5402-4) is a tanged tang style kit for free-running, stainless steel helical inserts. It includes a 1/4"-28 STI tap and inserts with a fine, right-hand thread, made from 18-8…

SKU 3G-OTH-527866

Also listed as: 54024 · 5402 4

Brand
HELI-COIL
Item
Thread Repair Kit: Tanged Tang Style
Category
Insert & Tool Kits
Available to Order
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

HELI-COIL
Manufacturer Part Number
5402-4
Type
Free-Running, Stainless Steel
Finish Type
Plain
Thread Size
1/4"-28
Thread Type
Fine
STI Tap Size
1/4"-28
Thread Direction
Right Hand
Compatible Material
Metal
Material Grade/Class
18-8
Insert Types Included
Helical Inserts
System of Measurement
Inch

Technical Documents

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HELI-COIL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The HELI-COIL Thread Repair Kit (MPN 5402-4) is a tanged tang style kit for free-running, stainless steel helical inserts. It includes a 1/4"-28 STI tap and inserts with a fine, right-hand thread, made from 18-8 stainless steel for metal repair. This inch-system kit is designed for restoring damaged threads in metal components.

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, free-running threads, ideal for automotive, industrial, and maintenance applications where original threads are stripped or worn.

What are the specifications of the HELI-COIL 5402-4 kit?

The HELI-COIL 5402-4 kit includes a 1/4"-28 STI tap and tanged tang style helical inserts. It features free-running, fine right-hand threads in 18-8 stainless steel, compatible with metal substrates. The kit uses inch-system measurements and is plain finish.

Where to buy HELI-COIL thread repair kits worldwide?

3G Electric supplies HELI-COIL thread repair kits worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver the 5402-4 kit and other thread repair products to your facility, regardless of location.

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 using the included STI tap, then wind the insert onto the installation tool and thread it into the tapped hole. Break off the tang after installation for a permanent repair.

Used in

Common applications for HELI-COIL
Aerospace engine repair — HELI-COIL STI taps for M12x1.75 metric threads in aluminum alloy components
Automotive transmission rebuild — HELI-COIL STI taps for 7/16-14 UNC threads in cast iron housings
Industrial pump maintenance — HELI-COIL STI taps for #10-32 UNF threads in stainless steel pump bodies
Hydraulic cylinder repair — HELI-COIL STI taps for M6x1 metric threads in steel cylinder heads
General manufacturing — HELI-COIL STI taps for 9/16-18 UNF threads in machinery base plates

HELI-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.

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