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HELI-COIL Screw-Locking Tanged Helical Insert, 1/4"-20, Plain, 100 PK - Screw-Locking Tanged Helical Inserts
HELI-COILScrew-Locking Tanged Helical Inserts

HELI-COIL Screw-Locking Tanged Helical Insert, 1/4"-20, Plain, 100 PK

The HELI-COIL Helical Insert is a tanged tang style, screw-locking insert in a plain finish, supplied in a 100-pack. It features a 1/4"-20 coarse thread size, right-hand thread direction, and is made from 18-8…

SKU 3G-OTH-528797

Also listed as: A35854CN500 · A3585 4CN500

Brand
HELI-COIL
Item
Screw-Locking Tanged Helical Insert, 1/4"-20, Plain, 100 PK
Category
Screw-Locking Tanged Helical Inserts
Available to Order
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Technical specs
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

HELI-COIL
Manufacturer Part Number
A3585-4CN500
Type
Screw-Locking, Plain, 100 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 in a plain finish, supplied in a 100-pack. It features a 1/4"-20 coarse thread size, right-hand thread direction, and is made from 18-8 material grade with a tensile strength of 200,000 to 250,000 psi. Compatible with metal, this inch-system insert uses an STI tap size of 1/4"-20 (MPN A3585-4CN500).

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is a HELI-COIL helical insert used for?

A HELI-COIL helical insert repairs or reinforces threads in metal. The screw-locking design resists vibration loosening. It is commonly used in automotive, aerospace, and industrial maintenance to restore stripped threads or strengthen aluminum components.

What are the specifications of the HELI-COIL A3585-4CN500 insert?

This HELI-COIL insert has a 1/4"-20 coarse thread size, right-hand direction, and 18-8 material grade. Tensile strength is 200,000 to 250,000 psi. It uses an STI tap size of 1/4"-20, is plain finish, and comes in a 100-pack. System of measurement is inch.

Where to buy HELI-COIL helical inserts worldwide?

3G Electric supplies HELI-COIL helical inserts worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver to your facility. Contact us to order the A3585-4CN500 or other HELI-COIL thread repair inserts.

How to install a HELI-COIL screw-locking insert?

Drill out the damaged thread to the specified STI tap size, then tap the hole with an STI tap. Install the insert using a tang drive tool until it sits below the surface. Break off the tang with a punch. The screw-locking feature holds the fastener under vibration.

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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Compatible alternatives & equivalents

Cross-referenced by specification & description
These 18-8 stainless steel helical inserts are designed to repair or reinforce tapped threads in metal. They feature a screw-locking design that resists loosening under vibration, with a dry film lubricant finish. Each insert has a 1/4"-20 coarse right-hand thread and requires an STI tap size of 1/4"-20. Tensile strength ranges from 200,000 to 250,000 psi. Supplied in a pack of 100
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These 18-8 stainless steel helical inserts are designed to repair or reinforce tapped threads in metal. They feature a screw-locking design that resists loosening under vibration, with a dry film lubricant finish. Each insert has a 1/4"-20 coarse right-hand thread and requires an STI tap size of 1/4"-20. Tensile strength ranges from 200,000 to 250,000 psi. Supplied in a pack of 100
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Screw-locking tanged helical insert for repairing or reinforcing threads in metal. Made of 18-8 stainless steel with dry film lubricant finish. Thread size 5/16"-18 coarse, right-hand direction. Tensile strength 200,000 to 250,000 psi. Requires STI tap size 5/16"-18. Pack of 100
Screw-locking helical insert for repairing or reinforcing #8-32 coarse internal threads in metal substrates. Made from Nitronic 60 with a tensile strength of 200,000 psi, it features a tanged tang design for installation and a plain finish. Requires an STI tap size of #8-32. Supplied in a 100-piece pack
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Screw-locking helical insert for repairing or reinforcing #8-32 coarse internal threads in metal substrates. Made from Nitronic 60 with a tensile strength of 200,000 psi, it features a tanged tang design for installation and a plain finish. Requires an STI tap size of #8-32. Supplied in a 100-piece pack
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
LYNDEX-NIKKEN Collet: TG100, 1/4 in (MPN 100-016)
LYNDEX-NIKKEN
LYNDEX-NIKKEN Collet: TG100, 1/4 in (MPN 100-016)
LYNDEX-NIKKEN Collet: TG100, 25/64 in (MPN 100-025)
LYNDEX-NIKKEN
LYNDEX-NIKKEN Collet: TG100, 25/64 in (MPN 100-025)

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Tanged helical insert for thread repair or reinforcement in metal substrates. Screw-locking design resists loosening under vibration. Made from Nitronic 60 with 200,000 psi tensile strength. Coarse right-hand thread, 5/16"-18 size, plain finish. Pack of 100
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