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HELI-COIL 5528-20 Thread Repair Kit, Free-Running, 1 1/4"-12, Stainless Steel - Insert & Tool Kits
HELI-COILInsert & Tool Kits

HELI-COIL 5528-20 Thread Repair Kit, Free-Running, 1 1/4"-12, Stainless Steel

The HELI-COIL Thread Repair Kit (MPN 5528-20) is a tanged tang style kit for free-running, stainless steel helical inserts with a 1 1/4"-12 fine thread size and 18-8 material grade. It includes an STI tap sized…

SKU 3G-OTH-527885

Also listed as: 552820 · 5528 20

Brand
HELI-COIL
Item
5528-20 Thread Repair Kit, Free-Running, 1 1/4"-12, Stainless Steel
Part Number
5528-20
Category
Insert & Tool Kits
Available to Order
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Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

HELI-COIL
Manufacturer Part Number
5528-20
Type
Free-Running, Stainless Steel
Finish Type
Plain
Thread Size
1 1/4"-12
Thread Type
Fine
STI Tap Size
1-1/4"-12
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 5528-20) is a tanged tang style kit for free-running, stainless steel helical inserts with a 1 1/4"-12 fine thread size and 18-8 material grade. It includes an STI tap sized 1-1/4"-12 and is compatible with metal substrates, using a right-hand thread direction in inch measurement.

Frequently Asked Questions

What is the HELI-COIL Thread Repair Kit 5528-20 used for?

The HELI-COIL Thread Repair Kit 5528-20 is used to restore damaged internal threads in metal components. It installs 18-8 stainless steel helical inserts with a 1 1/4"-12 fine thread, providing a durable, free-running thread repair for industrial machinery and equipment.

What are the specifications of the HELI-COIL 5528-20 thread repair kit?

The HELI-COIL 5528-20 kit includes helical inserts with 1 1/4"-12 fine thread size, 18-8 stainless steel material, right-hand thread direction, and an STI tap sized 1-1/4"-12. It is compatible with metal substrates and uses inch measurement.

Where to buy the HELI-COIL 5528-20 thread repair kit worldwide?

3G Electric supplies the HELI-COIL 5528-20 thread repair kit worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us to order this kit for your thread repair needs.

How to install a HELI-COIL thread insert from the 5528-20 kit?

To install a HELI-COIL insert from the 5528-20 kit, drill out the damaged thread to the specified size, tap the hole using the included STI tap (1-1/4"-12), then wind the insert into the tapped hole using the tang installation tool. 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
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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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