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HELI-COIL Screw-Locking Tanged Helical Insert - Screw-Locking Tanged Helical Inserts
HELI-COILScrew-Locking Tanged Helical Inserts

HELI-COIL Screw-Locking Tanged Helical Insert

The HELI-COIL Helical Insert is a tanged tang-style, screw-locking insert with a 7/8"-9 coarse thread, 7/8 in overall length, and a tensile strength of 200,000 to 250,000 psi. Made from 18-8 material, it is designed…

SKU 3G-OTH-528860

Also listed as: 358514CN875 · 3585 14CN875

Brand
HELI-COIL
Item
Screw-Locking Tanged Helical Insert
Category
Screw-Locking Tanged Helical Inserts
Available to Order
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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

Technical Specifications

HELI-COIL
Manufacturer Part Number
3585-14CN875
Type
Screw-Locking
Overall Lg
7/8 in
Tensile Strength
200,000 to 250,000 psi
Finish Type
Plain
Thread Size
7/8"-9
Thread Type
Coarse
STI Tap Size
7/8"-9
Thread Direction
Right Hand
Compatible Material
Metal
Material Grade/Class
18-8
System of Measurement
Inch

Technical Documents

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HELI-COIL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The HELI-COIL Helical Insert is a tanged tang-style, screw-locking insert with a 7/8"-9 coarse thread, 7/8 in overall length, and a tensile strength of 200,000 to 250,000 psi. Made from 18-8 material, it is designed for right-hand threading in metal and requires an STI tap size of 7/8"-9. 3G Electric interprets your demand for this OEM-specified insert, sources it across 14 industrial departments, and supports your application with specialist depth in fastening and assembly solutions.

Frequently Asked Questions

What is a HELI-COIL helical insert used for?

A HELI-COIL helical insert repairs or reinforces tapped threads in metal, providing a durable, screw-locking coarse thread for high-stress applications. It is ideal for aerospace, automotive, and industrial assembly where thread strength and reliability are critical.

What are the specifications of the HELI-COIL 3585-14CN875 insert?

This HELI-COIL insert has a 7/8"-9 coarse thread, 7/8 in overall length, and a tensile strength of 200,000 to 250,000 psi. It is made from 18-8 material, right-hand threaded, and requires an STI tap size of 7/8"-9 for installation in metal.

Where to buy HELI-COIL helical inserts worldwide?

3G Electric supplies HELI-COIL helical inserts worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source this OEM-specified insert across 14 departments and deliver it to your facility, ensuring compliance with your application requirements.

How to install a HELI-COIL tanged tang-style insert?

To install a HELI-COIL tanged insert, drill to the specified STI tap size (7/8"-9), tap the hole with the corresponding STI tap, then use a tang break-off tool to insert the coil. After installation, break off the tang for a flush finish. Always follow the manufacturer's torque and depth guidelines.

Used in

Common applications for HELI-COIL
Aerospace engine repair — HELI-COIL STI taps for M12x1.75 metric threads in aluminum alloy components
Automotive transmission rebuild — HELI-COIL STI taps for 7/16-14 UNC threads in cast iron housings
Industrial pump maintenance — HELI-COIL STI taps for #10-32 UNF threads in stainless steel pump bodies
Hydraulic cylinder repair — HELI-COIL STI taps for M6x1 metric threads in steel cylinder heads
General manufacturing — HELI-COIL STI taps for 9/16-18 UNF threads in machinery base plates

HELI-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.

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