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HELI-COIL Screw-Locking Tanged Helical Insert - Screw-Locking Tanged Helical Inserts
HELI-COILScrew-Locking Tanged Helical Inserts

HELI-COIL Screw-Locking Tanged Helical Insert

The HELI-COIL Helical Insert is a tanged tang-style, screw-locking insert for #4-40 coarse threads, supplied in a 100-piece pack. Made from 18-8 stainless steel with a plain finish, it delivers a tensile strength of…

SKU 3G-OTH-529002

Also listed as: A358504CN168 · A3585 04CN168

Brand
HELI-COIL
Item
Screw-Locking Tanged Helical Insert
Category
Screw-Locking Tanged Helical Inserts
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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
A3585-04CN168
Type
Screw-Locking, #4-40 Thread Size, Plain, Plain, 100 PK
Tensile Strength
200,000 to 250,000 psi
Finish Type
Plain
Thread Type
Coarse
STI Tap Size
#4-40
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 for #4-40 coarse threads, supplied in a 100-piece pack. Made from 18-8 stainless steel with a plain finish, it delivers a tensile strength of 200,000 to 250,000 psi and is compatible with metal substrates. This inch-system insert uses a right-hand thread direction and requires an STI tap size of #4-40.

Frequently Asked Questions

What is a HELI-COIL helical insert used for?

A HELI-COIL helical insert repairs or reinforces internal threads in metal. This screw-locking, tanged tang-style insert for #4-40 coarse threads provides a strong, wear-resistant thread in aluminum or steel components, preventing stripping and extending part life.

What are the specifications of the HELI-COIL A3585-04CN168 insert?

This HELI-COIL insert has a #4-40 thread size, coarse thread type, and right-hand direction. It is made from 18-8 stainless steel with a plain finish, offering a tensile strength of 200,000 to 250,000 psi. It requires an STI tap size of #4-40 and comes in a 100-piece pack.

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 this #4-40 screw-locking insert to your facility. Contact us for pricing and lead time on this 100-pack item.

How to install a tanged tang-style helical insert?

To install a tanged tang-style helical insert, drill and tap the hole to the specified STI tap size (here #4-40). Use a tang break-off tool to insert the coil, then break off the tang after installation. Ensure the insert is flush with the surface for proper thread locking.

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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