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3G Electric
HELI-COIL Screw-Locking Tanged Helical Insert, 5/16"-24, 500 PK - Screw-Locking Tanged Helical Inserts
HELI-COILScrew-Locking Tanged Helical Inserts

HELI-COIL Screw-Locking Tanged Helical Insert, 5/16"-24, 500 PK

The HELI-COIL Helical Insert is a tanged tang-style, screw-locking insert with a 5/16"-24 fine thread, right-hand direction, and a tensile strength of 200,000 to 250,000 psi. Supplied in a 500-piece pack, this 18-8…

SKU 3G-OTH-529034

Also listed as: 35915CNW469S · 3591 5CNW469S

Brand
HELI-COIL
Item
Screw-Locking Tanged Helical Insert, 5/16"-24, 500 PK
Part Number
3591-5CNW469S
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
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

HELI-COIL
Manufacturer Part Number
3591-5CNW469S
Type
Screw-Locking, 500 PK
Tensile Strength
200,000 to 250,000 psi
Finish Type
Dry Film Lubricant
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 with a 5/16"-24 fine thread, right-hand direction, and a tensile strength of 200,000 to 250,000 psi. Supplied in a 500-piece pack, this 18-8 stainless steel insert features a dry film lubricant finish and is compatible with metal substrates, requiring an STI tap size of 5/16"-24 for installation.

Frequently Asked Questions

What is a HELI-COIL helical insert used for?

A HELI-COIL helical insert repairs or reinforces tapped threads in metal. The screw-locking version resists vibration loosening. It is ideal for automotive, aerospace, and industrial maintenance where a strong, reusable 5/16"-24 fine thread is needed in aluminum or steel.

What are the specifications of the HELI-COIL 3591-5CNW469S insert?

This HELI-COIL insert has a 5/16"-24 fine thread, right-hand direction, and a tensile strength of 200,000 to 250,000 psi. It is made of 18-8 stainless steel with a dry film lubricant finish. The STI tap size is 5/16"-24, and it comes in a 500-piece pack.

Where to buy HELI-COIL helical inserts in worldwide?

3G Electric supplies HELI-COIL helical inserts worldwide. As a global industrial sourcing partner, we handle logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on the 3591-5CNW469S 500-pack screw-locking insert.

How to install a HELI-COIL tanged helical insert?

Install a HELI-COIL tanged insert by drilling to the specified hole size, tapping with the correct STI tap (5/16"-24 for this model), then winding the insert onto the installation tool until it is below the surface. Break off the tang with a punch. Use a thread-locking compound for added security.

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 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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