HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, 1 1/4"-12 Thread Size
The HELI-COIL Helical Insert is a tanged tang style, screw-locking insert in a plain finish, supplied in a 100-piece pack. It features a 1 1/4"-12 fine thread, right-hand direction, with an STI tap size of 1-1/4"-12…
SKU 3G-OTH-529020
Also listed as: A359120CN1250 · A3591 20CN1250
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 in a plain finish, supplied in a 100-piece pack. It features a 1 1/4"-12 fine thread, right-hand direction, with an STI tap size of 1-1/4"-12, and is made from 18-8 material grade with a tensile strength of 200,000 to 250,000 psi. This inch-system insert is compatible with metal substrates.
Frequently Asked Questions
What is a HELI-COIL helical insert used for?
A HELI-COIL helical insert repairs or reinforces threads in metal substrates. This screw-locking, tanged tang style insert with 1 1/4"-12 fine thread provides strong, wear-resistant threads in applications like automotive, aerospace, and industrial machinery, preventing thread stripping and extending component life.
What are the specifications of the HELI-COIL A3591-20CN1250 insert?
This HELI-COIL insert has a 1 1/4"-12 fine thread size, right-hand direction, and STI tap size of 1-1/4"-12. It is made from 18-8 material grade with a tensile strength of 200,000 to 250,000 psi. The plain finish, inch-system insert comes in a 100-piece pack and is compatible with metal substrates.
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, customs clearance, and delivery to your location. Contact us to order the A3591-20CN1250 or other HELI-COIL inserts for your thread repair needs.
How to install a HELI-COIL tanged helical insert?
To install a HELI-COIL tanged helical insert, drill the hole to the specified size, tap it using the correct STI tap (1-1/4"-12 for this insert), then use a tang installation tool to wind the insert into the tapped hole. After installation, break off the tang with a punch. Always follow manufacturer instructions 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.
