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HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, M3-0.50 Thread Size - Insert & Tool Kits
HELI-COILInsert & Tool Kits

HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, M3-0.50 Thread Size

The HELI-COIL Thread Repair Kit (MPN 5403-3) is a tanged tang style kit for free-running, M3-0.50 coarse thread repair in metal. It includes 18-8 stainless steel helical inserts and a right-hand thread STI tap…

SKU 3G-OTH-528073

Brand
HELI-COIL
Item
Thread Repair Kit: Tanged Tang Style, Free-Running, M3-0.50 Thread Size
Category
Insert & Tool Kits
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Technical Specifications

HELI-COIL
Manufacturer Part Number
5403-3
Type
Free-Running, M3-0.50 Thread Size, Stainless Steel
Finish Type
Plain
Thread Type
Coarse
STI Tap Size
M3-0.50
Thread Direction
Right Hand
Compatible Material
Metal
Material Grade/Class
18-8
Insert Types Included
Helical Inserts
System of Measurement
Metric
View Full Spec Sheet

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

Product Description

The HELI-COIL Thread Repair Kit (MPN 5403-3) is a tanged tang style kit for free-running, M3-0.50 coarse thread repair in metal. It includes 18-8 stainless steel helical inserts and a right-hand thread STI tap, supplied in metric sizing.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is a HELI-COIL Thread Repair Kit used for?

The HELI-COIL Thread Repair Kit (MPN 5403-3) is used to restore damaged internal threads in metal components. It installs 18-8 stainless steel helical inserts to create a new, durable M3-0.50 coarse thread, commonly applied in automotive, aerospace, and industrial maintenance.

What are the specifications of the HELI-COIL 5403-3 kit?

This kit includes tanged tang style, free-running helical inserts in 18-8 stainless steel. It has an M3-0.50 STI tap, right-hand thread direction, coarse thread type, and metric system of measurement. It is compatible with metal substrates and supplied by HELI-COIL.

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

3G Electric supplies the HELI-COIL Thread Repair Kit (MPN 5403-3) worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this kit to your facility. Contact us for availability and lead time.

How to install a HELI-COIL thread insert?

Drill out the damaged thread to the specified size, then tap the hole using the included STI tap. Insert the helical coil using the tang-style installation tool, then break off the tang. Ensure the insert sits below the surface for a secure, free-running M3-0.50 thread 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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HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, 3/4"-10 Thread Size, Stainless Steel (MPN 5401-12). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: 3/4"-10; 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, M20-2.50 Thread Size, 30 mm Overall Lg (MPN 5403-20). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: M20-2.50; 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, M20-2.50 Thread Size, 30 mm Overall Lg (MPN 5403-20). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: M20-2.50; Compatible Material: Metal; System of Measurement: Metric; Brand: HELI-COIL; Thread Type: Coarse.
HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, #10-32 Thread Size, Stainless Steel (MPN 5402-3). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: #10-32; 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, #10-32 Thread Size, Stainless Steel (MPN 5402-3). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: #10-32; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Thread Type: Fine.
HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, 5/8"-11 Thread Size, Stainless Steel (MPN 5401-10). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: 5/8"-18; 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, M14-1.25 Thread Size, Stainless Steel (MPN 5523-14). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: Special STI; Compatible Material: Metal; System of Measurement: Metric; Brand: HELI-COIL; Thread Type: Fine.
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HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, M18-1.50 Thread Size, Stainless Steel (MPN 5523-18). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; STI Tap Size: Special STI; Compatible Material: Metal; System of Measurement: Metric; Brand: HELI-COIL; Thread Type: Fine; Finish Type: Plain.
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