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HELI-COIL Free-Running Tangless Helical Insert - Free-Running Tangless Helical Inserts
HELI-COILFree-Running Tangless Helical Inserts

HELI-COIL Free-Running Tangless Helical Insert

The HELI-COIL Helical Insert is a free-running tangless insert with a #6-32 thread size, coarse right-hand thread, and plain finish. Made from 18-8 material with a tensile strength of 200,000 to 250,000 psi, it is…

SKU 3G-OTH-527317

Also listed as: AT118506C138 · AT1185 06C138

Brand
HELI-COIL
Item
Free-Running Tangless Helical Insert
Part Number
AT1185-06C138
Category
Free-Running Tangless Helical Inserts
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Payment
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Technical Specifications

HELI-COIL
Manufacturer Part Number
AT1185-06C138
Type
Free-Running, #6-32 Thread Size, Plain, Plain, 100 PK
Tensile Strength
200,000 to 250,000 psi
Finish Type
Plain
Thread Type
Coarse
STI Tap Size
#6-32
Thread Direction
Right Hand
Compatible Material
Metal
Material Grade/Class
18-8
System of Measurement
Inch

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

Product Description

The HELI-COIL Helical Insert is a free-running tangless insert with a #6-32 thread size, coarse right-hand thread, and plain finish. Made from 18-8 material with a tensile strength of 200,000 to 250,000 psi, it is compatible with metal and comes in a 100-piece pack (MPN AT1185-06C138).

Frequently Asked Questions

What is a HELI-COIL tangless helical insert used for?

A HELI-COIL tangless helical insert repairs or reinforces threads in metal. The tangless design eliminates the need for a break-off tang, simplifying installation. It is ideal for restoring stripped threads in automotive, aerospace, and industrial applications where a strong, free-running internal thread is required.

What are the specifications of the HELI-COIL AT1185-06C138 insert?

This HELI-COIL insert has a #6-32 thread size, coarse right-hand thread, and plain finish. It is made from 18-8 material with a tensile strength of 200,000 to 250,000 psi. The STI tap size is #6-32, and it is compatible with metal. The pack contains 100 pieces.

Where to buy HELI-COIL helical inserts worldwide?

3G Electric supplies HELI-COIL helical inserts worldwide. As a global industrial solutions provider, we handle logistics, customs, and delivery to your location. Contact us to order the AT1185-06C138 or other HELI-COIL thread repair inserts for your application.

How to install a tangless helical insert?

To install a tangless helical insert, drill the hole to the specified STI tap size, then tap threads using the correct STI tap. Insert the coil using a tangless installation tool, which drives the coil into place without a break-off tang. Ensure the insert is flush or slightly below the surface for proper thread engagement.

Used in

Common applications for HELI-COIL
Aerospace — Tangless screw-locking HELI-COIL inserts in 18-8 stainless steel for vibration-resistant threaded joints in airframe and engine components.
Automotive — Free-running tanged HELI-COIL inserts in metric sizes for repairing stripped threads in aluminum engine blocks and transmission housings.
Industrial machinery — STI taps and prewinder installation tools for on-site repair of threaded holes in cast iron and steel machine frames.
Oil and gas — Nitronic 60 HELI-COIL inserts for galling resistance in stainless steel valve bodies and pump housings exposed to corrosive media.
MRO and maintenance — HELI-COIL thread repair kits containing inserts, drill, tap, and installation tool for restoring damaged threads without replacing the parent component.
Electrical equipment — Screw-locking tangless HELI-COIL inserts for securing fasteners in metal enclosures and control panels subject to vibration.
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HELI-COIL Products

3G Electric supplies HELI-COIL free-running tangless helical inserts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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