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HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, M12-1.25 Thread Size - Insert & Tool Kits
HELI-COILInsert & Tool Kits

HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, M12-1.25 Thread Size

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

Brand
HELI-COIL
Item
Thread Repair Kit: Tanged Tang Style, Free-Running, M12-1.25 Thread Size
Category
Insert & Tool Kits
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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
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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

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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HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, #8-32 Thread Size, Stainless Steel (MPN 5401-2). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: #8-32; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Thread Type: Coarse.
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HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, #12-24 Thread Size, Stainless Steel (MPN 5401-1). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: #12-24; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Thread Type: Coarse.
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HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, #10-24 Thread Size, Stainless Steel (MPN 5401-3). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: #10-24; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Thread Type: Coarse.
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HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, 3/4"-16 Thread Size, Stainless Steel (MPN 5402-12). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: 3/4"-16; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Thread Type: Fine.
HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, M14-2.00 Thread Size, 21 mm Overall Lg (MPN 5403-14). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: M14-2.00; Compatible Material: Metal; System of Measurement: Metric; Brand: HELI-COIL; Thread Type: Coarse.
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HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, M3-0.50 Thread Size, Stainless Steel (MPN 5403-3). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: M3-0.50; Compatible Material: Metal; System of Measurement: Metric; Brand: HELI-COIL; Thread Type: Coarse.
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