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HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, #4-40 Thread Size - Insert & Tool Kits
HELI-COILInsert & Tool Kits

HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, #4-40 Thread Size

The HELI-COIL Thread Repair Kit (MPN 5401-04) is a tanged tang style kit for free-running, #4-40 thread size, coarse thread repairs in metal. It includes helical inserts made of 18-8 stainless steel with a plain…

SKU 3G-OTH-527852

Brand
HELI-COIL
Item
Thread Repair Kit: Tanged Tang Style, Free-Running, #4-40 Thread Size
Category
Insert & Tool Kits
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Technical Specifications

HELI-COIL
Manufacturer Part Number
5401-04
Type
Free-Running, #4-40 Thread Size, Stainless Steel
Finish Type
Plain
Thread Type
Coarse
STI Tap Size
#4-40
Thread Direction
Right Hand
Compatible Material
Metal
Material Grade/Class
18-8
Insert Types Included
Helical Inserts
System of Measurement
Inch
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HELI-COIL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The HELI-COIL Thread Repair Kit (MPN 5401-04) is a tanged tang style kit for free-running, #4-40 thread size, coarse thread repairs in metal. It includes helical inserts made of 18-8 stainless steel with a plain finish, right-hand thread direction, and an STI tap size of #4-40. 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. This kit is ideal for repairing #4-40 coarse threads in machinery, automotive, and industrial equipment, extending the life of parts without replacement.

What are the specifications of the HELI-COIL 5401-04 kit?

The HELI-COIL 5401-04 kit is a tanged tang style, free-running thread repair set for #4-40 coarse threads. It includes helical inserts made of 18-8 stainless steel with a plain finish, right-hand thread direction, and an STI tap size of #4-40. It is designed for metal substrates and uses the inch measurement system.

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, customs clearance, and delivery to your location. Contact us to source the 5401-04 kit or other HELI-COIL products for your maintenance and 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 using the included STI tap, then insert the helical coil using the tang-style installation tool. Break off the tang after insertion. Always follow the manufacturer's instructions for proper thread repair in metal components.

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.
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, 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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