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

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

The HELI-COIL Tangless Tang Style Helical Insert is a screw-locking, plain finish insert with a 1/4"-20 coarse thread and a tensile strength of 200,000 to 250,000 psi. Made from 18-8 material, it is compatible with…

SKU 3G-OTH-532446

Also listed as: T35854C250S · T3585 4C250S

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

Technical Specifications

HELI-COIL
Manufacturer Part Number
T3585-4C250S
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"-28
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 Tangless Tang Style Helical Insert is a screw-locking, plain finish insert with a 1/4"-20 coarse thread and a tensile strength of 200,000 to 250,000 psi. Made from 18-8 material, it is compatible with metal and supplied in a 1,000 PK. 3G Electric interprets customer demand and delivers genuine industrial equipment across 14 departments — and far more — with specialist depth in combustion, pumps and controls as an authorised distributor.

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 components, providing a durable 18-8 stainless steel thread with a tensile strength of 200,000 to 250,000 psi. The screw-locking design resists vibration loosening, making it ideal for demanding industrial applications.

What are the specifications of the HELI-COIL T3585-4C250S insert?

The HELI-COIL T3585-4C250S is a tangless, screw-locking helical insert with a 1/4"-20 coarse thread, plain finish, and 18-8 material grade. It requires an STI tap size of 1/4"-28, has a tensile strength of 200,000 to 250,000 psi, and is supplied in a 1,000-piece pack.

Where to buy HELI-COIL helical inserts worldwide?

3G Electric supplies genuine HELI-COIL helical inserts worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source and deliver the T3585-4C250S and other part numbers to any location, ensuring compliance with international shipping requirements.

How to install a tangless helical insert?

To install a tangless helical insert, drill and tap the hole to the specified STI tap size (1/4"-28 for this insert), then use a tangless installation tool to wind the insert into the threaded hole. No tang removal is needed, simplifying installation and reducing debris in the assembly.

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 tangless 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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