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HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, M4-0.70 Thread Size, Plain - Screw-Locking Tanged Helical Inserts
HELI-COILScrew-Locking Tanged Helical Inserts

HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, M4-0.70 Thread Size, Plain

The HELI-COIL Helical Insert is a tanged tang style, screw-locking insert with M4-0.70 thread size, plain finish, and 18-8 material grade. It requires a 4.2mm drill bit and M4-0.70 STI tap, offering tensile strength…

SKU 3G-OTH-529080

Brand
HELI-COIL
Item
Helical Insert: Tanged Tang Style, Screw-Locking, M4-0.70 Thread Size, Plain
Category
Screw-Locking Tanged Helical Inserts
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Technical Specifications

HELI-COIL
Manufacturer Part Number
4184-4CN040S
Type
Screw-Locking, M4-0.70 Thread Size, Plain, 1,000 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

The HELI-COIL Helical Insert is a tanged tang style, screw-locking insert with M4-0.70 thread size, plain finish, and 18-8 material grade. It requires a 4.2mm drill bit and M4-0.70 STI tap, offering tensile strength of 200,000 to 250,000 psi. Supplied in a 1,000-piece pack, this metric, right-hand threaded insert 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 substrates. It provides a durable, screw-locking thread for M4-0.70 fasteners, preventing loosening under vibration. This tanged tang style insert is ideal for automotive, aerospace, and industrial maintenance applications where stripped or worn threads need restoration.

What are the specifications of the HELI-COIL 4184-4CN040S insert?

The HELI-COIL 4184-4CN040S is a screw-locking, tanged tang insert with M4-0.70 thread size, plain finish, and 18-8 material grade. It requires a 4.2mm drill bit and M4-0.70 STI tap. Tensile strength ranges from 200,000 to 250,000 psi. Supplied in a 1,000-piece pack, it is metric, right-hand threaded, and compatible with metal.

Where to buy HELI-COIL helical inserts in 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 4184-4CN040S M4-0.70 screw-locking insert in 1,000-piece packs. We source genuine HELI-COIL products for industrial maintenance and repair.

How to install a HELI-COIL tanged tang insert?

To install a HELI-COIL tanged tang insert, drill a hole using a 4.2mm drill bit, then tap it with an M4-0.70 STI tap. Insert the tang into the driver tool and wind the coil into the tapped hole until it sits below the surface. Break off the tang with a punch. Ensure the substrate is metal 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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