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HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, 5/16"-18 Thread Size - Insert & Tool Kits
HELI-COILInsert & Tool Kits

HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, 5/16"-18 Thread Size

The HELI-COIL Thread Repair Kit (MPN 5401-5) is a tanged tang style insert and tool kit for repairing 5/16"-18 coarse, right-hand threads in metal. It includes 18-8 stainless steel helical inserts and a 5/16"-11 STI…

SKU 3G-OTH-527868

Brand
HELI-COIL
Item
Thread Repair Kit: Tanged Tang Style, Free-Running, 5/16"-18 Thread Size
Category
Insert & Tool Kits
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Technical Specifications

HELI-COIL
Manufacturer Part Number
5401-5
Type
Free-Running, Stainless Steel
Finish Type
Plain
Thread Size
5/16"-18
Thread Type
Coarse
STI Tap Size
5/16"-11
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 5401-5) is a tanged tang style insert and tool kit for repairing 5/16"-18 coarse, right-hand threads in metal. It includes 18-8 stainless steel helical inserts and a 5/16"-11 STI tap, supplied as a free-running, plain finish inch-system kit.

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?

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, commonly applied in automotive, industrial, and maintenance repairs for 5/16"-18 coarse threads.

What are the specifications of the HELI-COIL 5401-5 kit?

The HELI-COIL 5401-5 kit includes 18-8 stainless steel helical inserts for 5/16"-18 coarse, right-hand threads. It comes with a 5/16"-11 STI tap, plain finish, and is designed for inch-system metal repairs. The kit is tanged tang style and free-running.

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

3G Electric supplies the HELI-COIL Thread Repair Kit 5401-5 to customers worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this kit for 5/16"-18 thread repairs in metal components.

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 5/16"-11 STI tap, then wind the 18-8 stainless steel insert into the new thread using the tang. Break off the tang after installation for a free-running thread.

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, M14-1.25 Thread Size, Stainless Steel (MPN 5408-14). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: M14-1.25; 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, 1 1/4"-7 Thread Size, Stainless Steel (MPN 5521-20). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: 1-1/4"-7; 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, 1 1/4"-7 Thread Size, Stainless Steel (MPN 5521-20). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: 1-1/4"-7; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Thread Type: Coarse.
HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, 5/8"-18 Thread Size, Stainless Steel (MPN 5402-10). 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: Fine.
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HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, 5/8"-18 Thread Size, Stainless Steel (MPN 5402-10). 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: Fine.
HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, 1/2"-14 Thread Size, Stainless Steel (MPN 5407-8). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: 1/2"-14; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Thread Type: NPT.
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HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, M16-2.00 Thread Size, 24 mm Overall Lg (MPN 5403-16). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: M16-2.00; Compatible Material: Metal; System of Measurement: Metric; Brand: HELI-COIL; Drill Bit Size: 21/32.
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HELI-COIL Thread Repair Kit: Tanged Tang Style, Free-Running, 7/8"-9 Thread Size, Stainless Steel (MPN 5521-14). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; Insert Types Included: Helical Inserts; STI Tap Size: 7/8"-9; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Thread Type: Coarse.
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