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3G Electric
HELI-COIL Screw-Locking Tanged Helical Insert, 1/4"-28, Plain, 100 PK - Screw-Locking Tanged Helical Inserts
HELI-COILScrew-Locking Tanged Helical Inserts

HELI-COIL Screw-Locking Tanged Helical Insert, 1/4"-28, Plain, 100 PK

<p>The HELI-COIL Screw-Locking Tanged Helical Insert (1/4"-28, Plain, 100 PK) is a high-strength thread repair solution for metal applications. Manufactured from 18-8 stainless steel with a tensile strength of…

SKU 3G-OTH-529018

Also listed as: A35914CN500 · A3591 4CN500

Brand
HELI-COIL
Item
Screw-Locking Tanged Helical Insert, 1/4"-28, Plain, 100 PK
Part Number
A3591-4CN500
Category
Screw-Locking Tanged Helical Inserts
Available to Order
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Technical specs
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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
A3591-4CN500
Type
Screw-Locking, Plain, 100 PK
Tensile Strength
200,000 to 250,000 psi
Finish Type
Plain
Thread Size
1/4"-28
Thread Type
Fine
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

<p>The HELI-COIL Screw-Locking Tanged Helical Insert (1/4"-28, Plain, 100 PK) is a high-strength thread repair solution for metal applications. Manufactured from 18-8 stainless steel with a tensile strength of 200,000 to 250,000 psi, this inch-series insert features a fine thread and right-hand direction. The screw-locking design provides resistance to vibration, making it ideal for demanding industrial environments.</p><p>Procurement buyers in Singapore can request an SGD quote directly from 3G Electric, with GST handled for local orders and fast delivery across Singapore and Southeast Asia. Worldwide shipping is also available.</p>

Frequently Asked Questions

What is the thread size and type of this HELI-COIL insert?

The thread size is 1/4"-28 with a fine thread type. The STI tap size is also 1/4"-28, and it is right-hand threaded.

What material is this insert made of and what is its tensile strength?

It is made of 18-8 stainless steel (Material Grade/Class: 18-8) and has a tensile strength of 200,000 to 250,000 psi.

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
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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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Screw-locking tanged helical insert for repairing or reinforcing tapped threads in metal. Made of 18-8 stainless steel with dry film lubricant finish. #2-56 coarse thread, right-hand direction. Tensile strength 200,000 to 250,000 psi. Pack of 100
HELI-COIL
Screw-locking tanged helical insert for repairing or reinforcing tapped threads in metal. Made of 18-8 stainless steel with dry film lubricant finish. #2-56 coarse thread, right-hand direction. Tensile strength 200,000 to 250,000 psi. Pack of 100

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