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HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, M12-1.75 Thread Size - Insert & Tool Kits
HELI-COILInsert & Tool Kits

HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, M12-1.75 Thread Size

The HELI-COIL Thread Repair Kit (MPN 5403-12) is a tanged tang style, free-running insert and tool kit for M12-1.75 coarse metric threads. It includes 18-8 stainless steel helical inserts, a right-hand thread STI…

SKU 3G-OTH-528052

Brand
HELI-COIL
Item
Thread Repair Kit: Tanged Tang Style, Free-Running, M12-1.75 Thread Size
Category
Insert & Tool Kits
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Technical Specifications

HELI-COIL
Manufacturer Part Number
5403-12
Type
Free-Running, M12-1.75 Thread Size, Stainless Steel
Finish Type
Plain
Thread Type
Coarse
STI Tap Size
M12-1.75
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 5403-12) is a tanged tang style, free-running insert and tool kit for M12-1.75 coarse metric threads. It includes 18-8 stainless steel helical inserts, a right-hand thread STI tap, and is designed for metal repair applications.

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 a new, durable M12-1.75 coarse metric thread, ideal for automotive, industrial, and maintenance repairs.

What are the specifications of the HELI-COIL 5403-12 kit?

The HELI-COIL 5403-12 kit includes free-running, tanged tang style helical inserts in 18-8 stainless steel. It is for M12-1.75 coarse right-hand threads, includes an STI tap, and is compatible with metal substrates. System of measurement is metric.

Where to buy a HELI-COIL thread repair kit worldwide?

3G Electric supplies the HELI-COIL 5403-12 thread repair kit worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us to order this M12-1.75 kit for your repair needs.

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 18-8 stainless steel insert into the new M12-1.75 thread. Break off the tang after installation.

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, #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.
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.
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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, 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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