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HELI-COIL M4-0.70 Screw-Locking Tanged Helical Insert - Screw-Locking Tanged Helical Inserts
HELI-COILScrew-Locking Tanged Helical Inserts

HELI-COIL M4-0.70 Screw-Locking Tanged Helical Insert

HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, M4-0.70 Thread Size, Plain, 100 PK (MPN A4184-4CN100). This 18-8 stainless steel insert has a tensile strength of 200,000 to 250,000 psi, requires a 4.2mm…

SKU 3G-OTH-528813

Also listed as: A41844CN100 · A4184 4CN100

Brand
HELI-COIL
Item
M4-0.70 Screw-Locking Tanged Helical Insert
Part Number
A4184-4CN100
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
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.

Technical Specifications

HELI-COIL
Manufacturer Part Number
A4184-4CN100
Type
Screw-Locking, M4-0.70 Thread Size, Plain, 100 PK
Tensile Strength
200,000 to 250,000 psi
Finish Type
Plain
Thread Type
Coarse
STI Tap Size
M4-0.70
Drill Bit Size
4.2mm
Thread Direction
Right Hand
Compatible Material
Metal
Material Grade/Class
18-8
System of Measurement
Metric

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

Product Description

HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, M4-0.70 Thread Size, Plain, 100 PK (MPN A4184-4CN100). This 18-8 stainless steel insert has a tensile strength of 200,000 to 250,000 psi, requires a 4.2mm drill bit and M4-0.70 STI tap, and is compatible with metal substrates.

Frequently Asked Questions

What is a HELI-COIL helical insert used for?

A HELI-COIL helical insert repairs or reinforces threads in metal. This screw-locking, tanged tang style M4-0.70 insert provides strong, wear-resistant threads in aluminum, cast iron, or steel. It is ideal for automotive, aerospace, and industrial maintenance applications where stripped threads must be restored to original strength.

What are the specifications of the HELI-COIL A4184-4CN100 insert?

This HELI-COIL insert has an M4-0.70 thread size, 18-8 stainless steel construction, and a tensile strength of 200,000 to 250,000 psi. It requires a 4.2mm drill bit and an M4-0.70 STI tap. The screw-locking design resists vibration loosening. It comes in a 100-piece pack with plain finish.

Where to buy HELI-COIL helical inserts in worldwide?

3G Electric supplies genuine HELI-COIL helical inserts worldwide. We interpret your demand, source the correct part, and handle logistics, customs, and delivery to your facility globally. Contact us for availability and lead time on the A4184-4CN100 or other industrial inserts across our 14 departments.

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

Drill out the damaged thread using a 4.2mm bit, then tap the hole with an M4-0.70 STI tap. Insert the HELI-COIL tang-first using a winding tool, break off the tang after installation. The screw-locking feature grips the bolt to prevent loosening. 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 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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