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HELI-COIL Free-Running Tangless Helical Insert - Free-Running Tangless Helical Inserts
HELI-COILFree-Running Tangless Helical Inserts

HELI-COIL Free-Running Tangless Helical Insert

The HELI-COIL Helical Insert is a free-running tangless insert with #10-24 thread size, plain finish, and 18-8 material grade. It has a tensile strength of 200,000 to 250,000 psi, requires a 13/64 drill bit and…

SKU 3G-OTH-527346

Also listed as: T11853C285S · T1185 3C285S

Brand
HELI-COIL
Item
Free-Running Tangless Helical Insert
Category
Free-Running Tangless Helical Inserts
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Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
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Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

HELI-COIL
Manufacturer Part Number
T1185-3C285S
Type
Free-Running, #10-24 Thread Size, Plain, 1,000 PK
Tensile Strength
200,000 to 250,000 psi
Finish Type
Plain
Thread Type
Coarse
STI Tap Size
#10-24
Drill Bit Size
13/64
Thread Direction
Right Hand
Compatible Material
Metal
Material Grade/Class
18-8
System of Measurement
Inch

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

Product Description

The HELI-COIL Helical Insert is a free-running tangless insert with #10-24 thread size, plain finish, and 18-8 material grade. It has a tensile strength of 200,000 to 250,000 psi, requires a 13/64 drill bit and #10-24 STI tap, and is compatible with metal. Supplied in a 1,000-pack, this inch-system insert is designed for right-hand threads.

Frequently Asked Questions

What is a HELI-COIL Tangless Helical Insert used for?

A HELI-COIL Tangless Helical Insert repairs or reinforces internal threads in metal. It provides a strong, wear-resistant thread for #10-24 fasteners, ideal for automotive, aerospace, and industrial maintenance applications where stripped threads need restoration.

What are the specifications of the HELI-COIL T1185-3C285S insert?

This HELI-COIL insert is free-running, tangless, with #10-24 thread size, 18-8 material grade, and plain finish. It requires a 13/64 drill bit and #10-24 STI tap. Tensile strength is 200,000 to 250,000 psi. Supplied in a 1,000-pack for inch-system right-hand threads.

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 to order the T1185-3C285S or other HELI-COIL thread repair inserts for your application.

How to install a HELI-COIL tangless helical insert?

To install a HELI-COIL tangless insert, drill a hole using a 13/64 drill bit, then tap it with a #10-24 STI tap. Use a tangless installation tool to wind the insert into the tapped hole until it sits below the surface. No tang removal is needed, simplifying installation.

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 free-running 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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