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HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, M12-1.75 Thread Size - Screw-Locking Tanged Helical Inserts
HELI-COILScrew-Locking Tanged Helical Inserts

HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, M12-1.75 Thread Size

HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, M12-1.75 Thread Size, Plain, 100 PK (MPN A4184-12CN300). This 18-8 stainless steel insert has a tensile strength of 200,000 to 250,000 psi, requires a…

SKU 3G-OTH-528936

Brand
HELI-COIL
Item
Helical Insert: Tanged Tang Style, Screw-Locking, M12-1.75 Thread Size
Category
Screw-Locking Tanged Helical Inserts
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Technical Specifications

HELI-COIL
Manufacturer Part Number
A4184-12CN300
Type
Screw-Locking, M12-1.75 Thread Size, Plain, 100 PK
Tensile Strength
200,000 to 250,000 psi
Finish Type
Plain
Thread Type
Coarse
STI Tap Size
M12-1.75
Drill Bit Size
12.5mm
Thread Direction
Right Hand
Compatible Material
Metal
Material Grade/Class
18-8
System of Measurement
Metric
View Full Spec Sheet

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

Product Description

HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, M12-1.75 Thread Size, Plain, 100 PK (MPN A4184-12CN300). This 18-8 stainless steel insert has a tensile strength of 200,000 to 250,000 psi, requires a 12.5mm drill bit and M12-1.75 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, M12-1.75 insert provides a strong, wear-resistant thread in aluminum, cast iron, or steel. It is ideal for automotive, aerospace, and industrial maintenance applications where stripped or damaged threads need a permanent, high-strength repair.

What are the specifications of the HELI-COIL A4184-12CN300 insert?

This HELI-COIL insert has an M12-1.75 thread size, 18-8 stainless steel material, and a tensile strength of 200,000 to 250,000 psi. It requires a 12.5mm drill bit and an M12-1.75 STI tap. The screw-locking design resists vibration loosening. It comes in a 100-piece pack with plain finish and right-hand thread direction.

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 A4184-12CN300 M12-1.75 screw-locking insert. We source genuine HELI-COIL products for industrial maintenance and repair needs.

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

To install a HELI-COIL screw-locking insert, drill a 12.5mm hole, tap it with an M12-1.75 STI tap, then use a tang break-off tool to insert the coil. The tang is removed after installation. Ensure the hole is clean and lubricated. Follow standard thread repair practices for metal substrates to achieve full tensile strength.

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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HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, M6-1.00 Thread Size, Plain, 100 PK (MPN A4184-6EN120). Key specifications — Material Grade/Class: Nitronic 60; Thread Direction: Right Hand; STI Tap Size: M6-1.00; Compatible Material: Metal; System of Measurement: Metric; Brand: HELI-COIL; Drill Bit Size: 6.25mm; Tensile Strength: 200,000 psi.
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HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, 1 1/4"-12 Thread Size, Plain, 100 PK (MPN A3591-20CN1250). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; STI Tap Size: 1-1/4"-12; Compatible Material: Metal; System of Measurement: Inch; Brand: HELI-COIL; Tensile Strength: 200,000 to 250,000 psi; Thread Type: Fine.
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HELI-COIL Helical Insert: Tanged Tang Style, Screw-Locking, M4-0.70 Thread Size, 100 PK (MPN A4184-4CNW060). Key specifications — Material Grade/Class: 18-8; Thread Direction: Right Hand; STI Tap Size: M4-0.70; Compatible Material: Metal; System of Measurement: Metric; Brand: HELI-COIL; Drill Bit Size: 4.2mm; Tensile Strength: 200,000 to 250,000 psi.
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