HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, 1/4"-28 Thread Size
HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, 1/4"-28 Thread Size, 500 PK (MPN 3591-4CNW500S). This 18-8 stainless steel insert features a Dry Film Lubricant finish, right-hand fine threads, and a…
SKU 3G-OTH-528862
Also listed as: 35914CNW500S · 3591 4CNW500S
Local availability & support
- 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.
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Product Description
HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, 1/4"-28 Thread Size, 500 PK (MPN 3591-4CNW500S). This 18-8 stainless steel insert features a Dry Film Lubricant finish, right-hand fine threads, and a tensile strength of 200,000 to 250,000 psi. Designed for metal substrates, it requires an STI Tap Size of 1/4"-28 and is supplied in inch-system packaging.
Frequently Asked Questions
What is a HELI-COIL screw-locking helical insert used for?
A HELI-COIL screw-locking helical insert repairs or reinforces threads in metal substrates, providing a strong, wear-resistant thread that resists loosening under vibration. It is commonly used in automotive, aerospace, and industrial maintenance applications where thread integrity is critical.
What are the specifications of the HELI-COIL 3591-4CNW500S insert?
This HELI-COIL insert has a 1/4"-28 fine thread size, right-hand direction, and is made from 18-8 stainless steel with a Dry Film Lubricant finish. It offers a tensile strength of 200,000 to 250,000 psi and requires an STI Tap Size of 1/4"-28. Supplied in a 500-piece pack.
Where to buy HELI-COIL helical inserts in worldwide?
3G Electric supplies HELI-COIL helical inserts worldwide, handling full logistics and customs clearance for international orders. As a global industrial solutions provider, we source and deliver genuine HELI-COIL parts like the 3591-4CNW500S to any location, ensuring compliance with local import requirements.
How to install a HELI-COIL tanged screw-locking insert?
To install a HELI-COIL tanged insert, drill out the damaged thread to the specified size, tap the hole using the correct STI tap (1/4"-28 for this insert), then wind the insert into the tapped hole using a HELI-COIL installation tool. Break off the tang after installation for a permanent, locking thread.
Used in
Common applications for HELI-COILHELI-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.
