HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, 1/4"-20 Thread Size, Plain
The HELI-COIL Helical Insert is a tanged tang style, screw-locking insert in a plain finish, supplied in a 100-pack. It features a 1/4"-20 coarse right-hand thread, is made from 18-8 material grade, and offers a…
SKU 3G-OTH-528848
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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-pack. It features a 1/4"-20 coarse right-hand thread, is made from 18-8 material grade, and offers a tensile strength of 200,000 to 250,000 psi. Compatible with metal, this inch-system insert uses an STI tap size of 1/4"-20 (MPN A3585-4CN250).
Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.
Frequently Asked Questions
What is a HELI-COIL helical insert used for?
A HELI-COIL helical insert repairs or reinforces threads in metal. The screw-locking design resists vibration loosening. It is used in automotive, aerospace, and industrial maintenance to restore stripped threads or strengthen connections in aluminum, cast iron, and steel components.
What are the specifications of the HELI-COIL A3585-4CN250 insert?
This HELI-COIL insert has a 1/4"-20 coarse right-hand thread, 18-8 material grade, and tensile strength of 200,000 to 250,000 psi. It is a tanged tang style, screw-locking type in plain finish, compatible with metal, and uses an STI tap size of 1/4"-20. Supplied in a 100-pack.
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 full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on the A3585-4CN250 100-pack or other HELI-COIL thread repair inserts.
How to install a HELI-COIL screw-locking insert?
Drill out the damaged thread to the specified STI tap size (1/4"-20 for this insert), tap the hole with the corresponding STI tap, then use a tang break-off tool to install the insert. After installation, break off the tang. Ensure the hole is clean and lubricated for proper seating.
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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.









