HELI-COIL Screw-Locking Tangless Helical Insert
The HELI-COIL Helical Insert is a screw-locking tangless helical insert in a #10-32 thread size, plain finish, supplied in a 1,000-piece pack (MPN T3591-3C380S). It features an 18-8 material grade, right-hand thread…
SKU 3G-OTH-532489
Also listed as: T35913C380S · T3591 3C380S
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.
Compliance & shipping
- Hazardous material
- Not classified as hazardous
- California Prop 65 warning
- No warning recorded
- Licence required
- No licence required
- Safety Data Sheet
- Not available
- Special shipping
- Ships under standard freight
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Product Description
The HELI-COIL Helical Insert is a screw-locking tangless helical insert in a #10-32 thread size, plain finish, supplied in a 1,000-piece pack (MPN T3591-3C380S). It features an 18-8 material grade, right-hand thread direction, and a tensile strength of 200,000 to 250,000 psi, requiring a 13/64 drill bit and #10-32 STI tap for installation in metal.
Frequently Asked Questions
What is a HELI-COIL tangless helical insert used for?
A HELI-COIL tangless helical insert repairs or reinforces threads in metal. The screw-locking design resists vibration loosening, and the tangless style eliminates the need to break off a tang after installation. It is ideal for automotive, aerospace, and industrial maintenance applications.
What are the specifications of the HELI-COIL T3591-3C380S insert?
This HELI-COIL insert has a #10-32 thread size, 18-8 material grade, and tensile strength of 200,000 to 250,000 psi. It requires a 13/64 drill bit and #10-32 STI tap. The plain finish, right-hand thread, and screw-locking feature suit metal substrates. Pack of 1,000.
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 pricing and lead time on the T3591-3C380S or other thread repair inserts.
How to install a tangless helical insert?
To install a HELI-COIL tangless insert, drill a hole using the specified 13/64 drill bit, tap it with a #10-32 STI tap, then wind the insert into the tapped hole using a tangless installation tool. The screw-locking feature secures the insert without a tang to remove.
Used in
Common applications for HELI-COILHELI-COIL Products
3G Electric supplies HELI-COIL screw-locking tangless helical inserts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
