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3G Electric
HELI-COIL Screw-Locking Tangless Helical Insert, #4-40 Thread, Plain, 100 PK - Screw-Locking Tangless Helical Inserts
HELI-COILScrew-Locking Tangless Helical Inserts

HELI-COIL Screw-Locking Tangless Helical Insert, #4-40 Thread, Plain, 100 PK

The HELI-COIL Helical Insert (Tangless Tang Style) is a screw-locking, #4-40 thread size, plain finish insert made from 18-8 material with a tensile strength of 200,000 to 250,000 psi. It features a right-hand coarse…

SKU 3G-OTH-532486

Also listed as: AT358504C224 · AT3585 04C224

Brand
HELI-COIL
Item
Screw-Locking Tangless Helical Insert, #4-40 Thread, Plain, 100 PK
Part Number
AT3585-04C224
Category
Screw-Locking Tangless 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
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.

Compliance & shipping

Hazardous material
Not classified as hazardous
California Prop 65 warning
No warning recorded
Licence required
No licence required
Safety Data Sheet
Not available
Special shipping
Ships under standard freight

Technical Specifications

HELI-COIL
Manufacturer Part Number
AT3585-04C224
Series
Heli-Coil
Type
Screw-Locking, #4-40 Thread Size, Plain, 100 PK
Material
Stainless Steel
Tensile Strength
200,000 to 250,000 psi
Finish
Plain
UNSPSC
31162802
Tang Style
Tangless
Display Qty
100
Finish Type
Plain
Thread Size
#4-40 Thread Size This describes the nominal diameter of the fastener that will mate with the insert once installed. This size is smaller than the drill bit size or the corresponding tap size.
Thread Type
Coarse
Catalog Page
N/A
STI Tap Size
#4-40
Drill Bit Size
#31 Drill Bit Size This describes the size of the drill bit used to install these helical inserts.
Overall Length
7/32 in Overall Length
Display Sell UOM
PK
Thread Direction
Right Hand
Country of Origin
USA (subject to change)
Rockwell Hardness
C43-C50
Free Coil Diameter
0.15 in Free Coil Diameter
Compatible Material
Metal
Helical Insert Type
Screw-Locking
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 (Tangless Tang Style) is a screw-locking, #4-40 thread size, plain finish insert made from 18-8 material with a tensile strength of 200,000 to 250,000 psi. It features a right-hand coarse thread, is compatible with metal, and comes in a 100-piece pack (MPN AT3585-04C224).

Frequently Asked Questions

What is a HELI-COIL Tangless helical insert used for?

A HELI-COIL Tangless helical insert repairs or reinforces threads in metal. The screw-locking design resists vibration loosening, and the tangless style eliminates the need to break off a tang after installation. It is commonly used in automotive, aerospace, and industrial maintenance applications.

What are the specifications of the HELI-COIL AT3585-04C224 insert?

The HELI-COIL AT3585-04C224 is a screw-locking, tangless helical insert with #4-40 thread size, coarse right-hand threads, and plain finish. It is made from 18-8 stainless steel with a tensile strength of 200,000 to 250,000 psi. The pack contains 100 pieces and requires a #4-40 STI tap.

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, customs clearance, and delivery to your facility. Contact us for pricing and lead time on the AT3585-04C224 or other thread repair inserts.

How to install a tangless helical insert?

To install a tangless helical insert, drill the hole to the specified size, tap it with the correct STI tap (for this insert, #4-40 STI), then use a tangless installation tool to wind the insert into the threaded hole. No tang removal is needed. Always follow the manufacturer's instructions for best results.

Used in

Common applications for HELI-COIL
Aerospace — Tangless screw-locking HELI-COIL inserts in 18-8 stainless steel for vibration-resistant threaded joints in airframe and engine components.
Automotive — Free-running tanged HELI-COIL inserts in metric sizes for repairing stripped threads in aluminum engine blocks and transmission housings.
Industrial machinery — STI taps and prewinder installation tools for on-site repair of threaded holes in cast iron and steel machine frames.
Oil and gas — Nitronic 60 HELI-COIL inserts for galling resistance in stainless steel valve bodies and pump housings exposed to corrosive media.
MRO and maintenance — HELI-COIL thread repair kits containing inserts, drill, tap, and installation tool for restoring damaged threads without replacing the parent component.
Electrical equipment — Screw-locking tangless HELI-COIL inserts for securing fasteners in metal enclosures and control panels subject to vibration.
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HELI-COIL Products

3G Electric supplies HELI-COIL screw-locking 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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Screw-locking tangless helical insert for repairing or reinforcing threads in metal. Made from 18-8 stainless steel with dry film lubricant finish, fine right-hand thread, and tensile strength of 200,000 to 250,000 psi. Requires STI tap size #10-32. Pack of 100
HELI-COIL
Screw-locking tangless helical insert for repairing or reinforcing threads in metal. Made from 18-8 stainless steel with dry film lubricant finish, fine right-hand thread, and tensile strength of 200,000 to 250,000 psi. Requires STI tap size #10-32. Pack of 100

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