We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
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 5405-12) is a tanged tang style kit for free-running, M12-1.25 fine thread repairs in metal. It includes 18-8 stainless steel helical inserts and an STI tap, with right-hand…

SKU 3G-OTH-527893

Also listed as: 540512 · 5405 12

Brand
HELI-COIL
Item
Thread Repair Kit: Tanged Tang Style
Part Number
5405-12
Category
Insert & Tool Kits
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

HELI-COIL
Manufacturer Part Number
5405-12
Type
Free-Running, M12-1.25 Thread Size, Stainless Steel
Finish Type
Plain
Thread Type
Fine
STI Tap Size
M12-1.25
Thread Direction
Right Hand
Compatible Material
Metal
Material Grade/Class
18-8
Insert Types Included
Helical Inserts
System of Measurement
Metric

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The HELI-COIL Thread Repair Kit (MPN 5405-12) is a tanged tang style kit for free-running, M12-1.25 fine thread repairs in metal. It includes 18-8 stainless steel helical inserts and an STI tap, with right-hand thread direction and metric sizing.

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 M12-1.25 fine threads. This kit is ideal for automotive, industrial, and maintenance applications where original threads are stripped or worn.

What are the specifications of the HELI-COIL 5405-12 kit?

The HELI-COIL 5405-12 kit includes tanged tang style helical inserts in 18-8 stainless steel, an STI tap sized M12-1.25, and supports right-hand, fine threads. It is designed for metal substrates and uses metric measurement. The kit is plain finish and free-running type.

Where to buy a HELI-COIL Thread Repair Kit worldwide?

3G Electric supplies the HELI-COIL Thread Repair Kit (MPN 5405-12) worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this M12-1.25 free-running kit.

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 (M12-1.25), then wind the helical insert into the tapped hole using the tang. Break off the tang after installation. Always follow the manufacturer's instructions for best results.

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
Not sure this is the right part? Photo-identify it

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from HELI-COIL

View all HELI-COIL parts
This kit includes 18-8 stainless steel helical inserts for restoring damaged #10-32 fine threads in metal components. The free-running inserts are right-hand threaded and require an STI tap of the same size. Suitable for general thread repair applications in metal substrates
HELI-COIL
This kit includes 18-8 stainless steel helical inserts for restoring damaged #10-32 fine threads in metal components. The free-running inserts are right-hand threaded and require an STI tap of the same size. Suitable for general thread repair applications in metal substrates
This kit includes 18-8 stainless steel helical inserts and a 1/4"-28 STI tap for creating free-running, fine right-hand threads in metal components. The tanged tang style inserts are used to repair stripped or worn internal threads. Suitable for general metal repair applications where inch-system threads are required
HELI-COIL
This kit includes 18-8 stainless steel helical inserts and a 1/4"-28 STI tap for creating free-running, fine right-hand threads in metal components. The tanged tang style inserts are used to repair stripped or worn internal threads. Suitable for general metal repair applications where inch-system threads are required
This thread repair kit includes helical inserts made of 18-8 stainless steel with a plain finish, designed for restoring damaged internal threads in metal components. It is a tanged tang style, free-running kit for #4-40 coarse threads, right-hand thread direction, and includes an STI tap of the same size. Suitable for use in machinery, automotive, and industrial equipment where inch-system threads are required
HELI-COIL
This thread repair kit includes helical inserts made of 18-8 stainless steel with a plain finish, designed for restoring damaged internal threads in metal components. It is a tanged tang style, free-running kit for #4-40 coarse threads, right-hand thread direction, and includes an STI tap of the same size. Suitable for use in machinery, automotive, and industrial equipment where inch-system threads are required
This kit includes helical inserts made from 18-8 stainless steel with a plain finish, designed for repairing damaged M18-2.50 coarse threads in metal components. The inserts have a 27 mm overall length and right-hand thread direction. Suitable for industrial maintenance and repair applications where thread restoration is required
HELI-COIL
This kit includes helical inserts made from 18-8 stainless steel with a plain finish, designed for repairing damaged M18-2.50 coarse threads in metal components. The inserts have a 27 mm overall length and right-hand thread direction. Suitable for industrial maintenance and repair applications where thread restoration is required

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first