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HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 1/4"-28 Thread Size - Free-Running Tanged Helical Inserts
HELI-COILFree-Running Tanged Helical Inserts

HELI-COIL Helical Insert: Tanged Tang Style, Free-Running, 1/4"-28 Thread Size

HELI-COIL Helical Insert: Tanged Tang Style, a free-running tanged helical insert in a 100-piece pack. This 18-8 metal insert has a 1/4"-28 fine thread size, right-hand orientation, and a tensile strength range of…

SKU 3G-OTH-599113

Also listed as: A11914CNW250 · A1191 4CNW250

Brand
HELI-COIL
Item
Helical Insert: Tanged Tang Style, Free-Running, 1/4"-28 Thread Size
Category
Free-Running 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
A1191-4CNW250
Type
Free-Running, 100 PK
Thread Size
1/4"-28

Technical Documents

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

Product Description

HELI-COIL Helical Insert: Tanged Tang Style, a free-running tanged helical insert in a 100-piece pack. This 18-8 metal insert has a 1/4"-28 fine thread size, right-hand orientation, and a tensile strength range of 200,000 to 250,000 psi, with a dry film lubricant coating.

Frequently Asked Questions

What is a HELI-COIL helical insert used for?

A HELI-COIL helical insert repairs or reinforces threads in metal components. It provides a durable, free-running internal thread for fasteners, commonly used in automotive, aerospace, and industrial maintenance applications where stripped or worn threads need restoration.

What are the specifications of the HELI-COIL A1191-4CNW250 insert?

This HELI-COIL insert is a free-running, tanged tang style with a 1/4"-28 fine thread size, right-hand orientation, and 18-8 metal construction. It offers a tensile strength of 200,000 to 250,000 psi and includes a dry film lubricant coating. Pack of 100 pieces.

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 and customs clearance to deliver these inserts to your facility. Contact us for pricing and lead time on the A1191-4CNW250 or other thread repair inserts.

How to install a HELI-COIL tanged helical insert?

To install a HELI-COIL tanged insert, drill out the damaged thread to the specified tap drill size, tap the hole with the correct HELI-COIL tap, then use the installation tool to wind the insert into the hole. Break off the tang after installation for a permanent thread repair.

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 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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