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HELI-COIL Screw-Locking Tanged Helical Insert, 1/4"-20, Plain, 18-8, 1,000 PK - Screw-Locking Tanged Helical Inserts
HELI-COILScrew-Locking Tanged Helical Inserts

HELI-COIL Screw-Locking Tanged Helical Insert, 1/4"-20, Plain, 18-8, 1,000 PK

The HELI-COIL Helical Insert is a tanged tang-style, screw-locking insert for metal, supplied in a 1,000-pack. It features a 1/4"-20 coarse right-hand thread, plain finish, 18-8 material grade, and a tensile strength…

SKU 3G-OTH-528926

Also listed as: 35854CN250S · 3585 4CN250S

Brand
HELI-COIL
Item
Screw-Locking Tanged Helical Insert, 1/4"-20, Plain, 18-8, 1,000 PK
Category
Screw-Locking Tanged Helical Inserts
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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.

Technical Specifications

HELI-COIL
Manufacturer Part Number
3585-4CN250S
Type
Screw-Locking, Plain, 1,000 PK
Tensile Strength
200,000 to 250,000 psi
Finish Type
Plain
Thread Size
1/4"-20
Thread Type
Coarse
STI Tap Size
1/4"-20
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 for metal, supplied in a 1,000-pack. It features a 1/4"-20 coarse right-hand thread, plain finish, 18-8 material grade, and a tensile strength of 200,000 to 250,000 psi. 3G Electric interprets your demand for threaded repair and reinforcement, sources this OEM insert, and supports your application with specialist expertise across 14 industrial departments.

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 strong, wear-resistant thread for fasteners, preventing stripping in soft materials like aluminum. 3G Electric sources this OEM insert and supports your application with specialist expertise across 14 industrial departments.

What are the specifications of the HELI-COIL 3585-4CN250S 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 screw-locking, tanged tang-style insert with plain finish, supplied in a 1,000-pack. Compatible with metal substrates.

Where to buy HELI-COIL helical inserts in worldwide?

3G Electric supplies HELI-COIL helical inserts worldwide. We interpret your demand, source the OEM part, and handle logistics, customs, and delivery to your location. Contact us for availability and lead time on the 3585-4CN250S or other thread repair inserts.

How to install a HELI-COIL tanged helical insert?

Install a HELI-COIL tanged insert by drilling out the damaged thread, tapping with the specified STI tap (1/4"-20), then winding the insert into the hole using a tang drive tool. After installation, break off the tang. 3G Electric can advise on tooling and best practices for your application.

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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