HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, 1/4"-28 Thread Size, Plain
The HELI-COIL Helical Insert is a tanged tang-style, screw-locking insert with a plain finish, designed for 1/4"-28 fine threads in metal. Supplied in a 1,000-piece pack, it features 18-8 material grade and a tensile…
SKU 3G-OTH-528929
Also listed as: 35914CN500S · 3591 4CN500S
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
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Product Description
The HELI-COIL Helical Insert is a tanged tang-style, screw-locking insert with a plain finish, designed for 1/4"-28 fine threads in metal. Supplied in a 1,000-piece pack, it features 18-8 material grade and a tensile strength of 200,000 to 250,000 psi, with a right-hand thread direction and STI tap size of 1/4"-28.
Frequently Asked Questions
What is a HELI-COIL helical insert used for?
A HELI-COIL helical insert repairs or reinforces tapped threads in metal. It provides a durable, screw-locking thread for 1/4"-28 fine threads, ideal for automotive, aerospace, and industrial applications where stripped or worn threads need restoration.
What are the specifications of the HELI-COIL 3591-4CN500S insert?
This HELI-COIL insert has a 1/4"-28 fine thread, 18-8 material grade, tensile strength of 200,000 to 250,000 psi, right-hand thread direction, and plain finish. It comes in a 1,000-piece pack with STI tap size 1/4"-28, designed for metal substrates.
Where to buy HELI-COIL helical inserts in 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 3591-4CN500S or other thread repair inserts for your application.
How to install a HELI-COIL screw-locking insert?
Install a HELI-COIL screw-locking insert by drilling to the specified STI tap size (1/4"-28), tapping the hole, then using a tang break-off tool to insert the coil. The screw-locking feature grips the bolt to resist vibration. Follow standard thread repair procedures for best results.
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.
