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3G Electric
HELI-COIL Screw-Locking Tanged Helical Insert, 5/16"-24, Plain, 100 PK - Screw-Locking Tanged Helical Inserts
HELI-COILScrew-Locking Tanged Helical Inserts

HELI-COIL Screw-Locking Tanged Helical Insert, 5/16"-24, Plain, 100 PK

The HELI-COIL Helical Insert is a tanged tang-style, screw-locking insert in a plain finish, supplied in a 100-pack. It features a 5/16"-24 fine thread, right-hand direction, and an 18-8 material grade with a tensile…

SKU 3G-OTH-529021

Also listed as: A35915CN469 · A3591 5CN469

Brand
HELI-COIL
Item
Screw-Locking Tanged Helical Insert, 5/16"-24, Plain, 100 PK
Part Number
A3591-5CN469
Category
Screw-Locking Tanged Helical Inserts
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.

Technical Specifications

HELI-COIL
Manufacturer Part Number
A3591-5CN469
Type
Screw-Locking, Plain, 100 PK
Tensile Strength
200,000 to 250,000 psi
Finish Type
Plain
Thread Size
5/16"-24
Thread Type
Fine
STI Tap Size
5/16"-24
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 tanged tang-style, screw-locking insert in a plain finish, supplied in a 100-pack. It features a 5/16"-24 fine thread, right-hand direction, and an 18-8 material grade with a tensile strength of 200,000 to 250,000 psi. Designed for metal compatibility, this inch-system insert uses an STI tap size of 5/16"-24 (MPN A3591-5CN469).

Frequently Asked Questions

What is a HELI-COIL helical insert used for?

A HELI-COIL helical insert repairs or reinforces threads in metal components. This screw-locking tanged tang style, 5/16"-24 fine thread, 18-8 stainless steel insert provides a strong, wear-resistant thread in applications like automotive, aerospace, and industrial machinery.

What are the specifications of the HELI-COIL A3591-5CN469 insert?

This HELI-COIL insert has a 5/16"-24 fine thread, right-hand direction, and an 18-8 material grade with tensile strength of 200,000 to 250,000 psi. It is a screw-locking tanged tang style in plain finish, compatible with metal, and uses an STI tap size of 5/16"-24. Supplied in a 100-pack.

Where to buy HELI-COIL helical inserts worldwide?

3G Electric supplies HELI-COIL helical inserts worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this 5/16"-24 screw-locking insert (MPN A3591-5CN469) to your facility. Contact us for availability and delivery to your region.

How to install a tanged helical insert?

To install a HELI-COIL tanged insert, drill the hole to the specified STI tap size (5/16"-24), tap the threads, then use a tang break-off tool to insert the coil. After installation, break off the tang with a punch. Ensure the insert is fully seated below the surface for proper locking.

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 screw-locking tanged 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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