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HELI-COIL Screw-Locking Tanged Helical Insert - Screw-Locking Tanged Helical Inserts
HELI-COILScrew-Locking Tanged Helical Inserts

HELI-COIL Screw-Locking Tanged Helical Insert

3G Electric supplies the HELI-COIL Helical Insert: Tanged Tang Style, a screw-locking tanged helical insert in a 100-pack. This 18-8 stainless steel insert features a 5/16"-18 coarse thread, right-hand direction, dry…

SKU 3G-OTH-529099

Also listed as: A35855CNW312 · A3585 5CNW312

Brand
HELI-COIL
Item
Screw-Locking Tanged Helical Insert
Part Number
A3585-5CNW312
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
A3585-5CNW312
Type
Screw-Locking, 100 PK
Tensile Strength
200,000 to 250,000 psi
Finish Type
Dry Film Lubricant
Thread Size
5/16"-18
Thread Type
Coarse
STI Tap Size
5/16"-18
Thread Direction
Right Hand
Compatible Material
Metal
Material Grade/Class
18-8
System of Measurement
Inch

Technical Documents

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

Product Description

3G Electric supplies the HELI-COIL Helical Insert: Tanged Tang Style, a screw-locking tanged helical insert in a 100-pack. This 18-8 stainless steel insert features a 5/16"-18 coarse thread, right-hand direction, dry film lubricant finish, and tensile strength of 200,000 to 250,000 psi. It is compatible with metal and requires an STI tap size of 5/16"-18.

Frequently Asked Questions

What is a HELI-COIL helical insert used for?

A HELI-COIL helical insert repairs or reinforces threads in metal. This screw-locking tanged style prevents loosening under vibration. It is used in automotive, aerospace, and industrial maintenance to restore stripped threads or strengthen aluminum and other soft metals.

What are the specifications of the HELI-COIL A3585-5CNW312 insert?

This HELI-COIL insert has a 5/16"-18 coarse thread, right-hand direction, and is made of 18-8 stainless steel with a dry film lubricant finish. Tensile strength is 200,000 to 250,000 psi. It requires an STI tap size of 5/16"-18 and comes in a 100-pack.

Where to buy HELI-COIL helical inserts worldwide?

3G Electric supplies HELI-COIL helical inserts worldwide. We handle full logistics and customs clearance to deliver genuine parts like the A3585-5CNW312 to your facility. Contact us for availability and lead time on this 100-pack of screw-locking tanged inserts.

How to install a HELI-COIL tanged helical insert?

Drill out the damaged thread to the specified STI tap size (5/16"-18 for this insert), then tap the hole with the corresponding STI tap. Use a tang break-off tool to insert the coil, then break off the tang after installation. Ensure the hole is clean and lubricated.

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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