We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

HELI-COIL Threaded Mandrel Type AM - Installation Tools for Helical Inserts
HELI-COILInstallation Tools for Helical Inserts

HELI-COIL Threaded Mandrel Type AM

The HELI-COIL Threaded Mandrel Type AM (MPN 3747-12) is a metric, right-hand, coarse-thread installation tool for steel helical inserts. 3G Electric interprets this demand and delivers the correct tool across 14…

SKU 3G-OTH-531085

Also listed as: 374712 · 3747 12

Brand
HELI-COIL
Item
Threaded Mandrel Type AM
Category
Installation Tools for Helical Inserts
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

HELI-COIL
Manufacturer Part Number
3747-12
Type
Helical Inserts, Steel
Tool Type
Threaded Mandrel Type AM
System of Measurement
Metric
Compatible Insert Type
Helical Inserts
Compatible Thread Type
Coarse
Compatible Thread Direction
Right Hand

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The HELI-COIL Threaded Mandrel Type AM (MPN 3747-12) is a metric, right-hand, coarse-thread installation tool for steel helical inserts. 3G Electric interprets this demand and delivers the correct tool across 14 industrial departments, with specialist depth in combustion, pumps and controls as an authorised distributor for brands like Schneider, ABB, Siemens, SKF, Festo, Fluke, Interpump and FBR.

Frequently Asked Questions

What is the HELI-COIL Threaded Mandrel Type AM used for?

The HELI-COIL Threaded Mandrel Type AM (MPN 3747-12) is a metric installation tool for steel helical inserts. It is used to install coarse, right-hand thread inserts into tapped holes, restoring or reinforcing threads in metal components across industrial maintenance and repair applications.

What are the specifications of the HELI-COIL Threaded Mandrel Type AM?

The HELI-COIL Threaded Mandrel Type AM (MPN 3747-12) is a metric, right-hand, coarse-thread installation tool for steel helical inserts. It is designed for helical insert types and is made by HELI-COIL. The tool is used to drive inserts into pre-tapped holes.

Where to buy the HELI-COIL Threaded Mandrel Type AM worldwide?

3G Electric supplies the HELI-COIL Threaded Mandrel Type AM (MPN 3747-12) worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us to order this metric installation tool for helical inserts.

How to install a helical insert with the HELI-COIL Threaded Mandrel Type AM?

To install a helical insert with the HELI-COIL Threaded Mandrel Type AM, first tap the hole to the correct size. Place the insert onto the mandrel tang, then align the tool with the hole and turn clockwise to wind the insert into place. Break off the tang after installation.

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 installation tools for helical inserts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from HELI-COIL

View all HELI-COIL parts
Steel prewinder tool for installing helical inserts with right-hand, coarse metric threads. Used to prewind and align inserts during installation in threaded holes. Compatible with HELI-COIL helical inserts
HELI-COIL
Steel prewinder tool for installing helical inserts with right-hand, coarse metric threads. Used to prewind and align inserts during installation in threaded holes. Compatible with HELI-COIL helical inserts
This threaded mandrel tool is used to install steel helical inserts into pre-tapped holes for thread repair or reinforcement. It is designed for right-hand coarse threads in inch measurements. Compatible with HELI-COIL helical inserts
HELI-COIL
This threaded mandrel tool is used to install steel helical inserts into pre-tapped holes for thread repair or reinforcement. It is designed for right-hand coarse threads in inch measurements. Compatible with HELI-COIL helical inserts
The HELI-COIL Prewinder Type II is a steel installation tool designed for prewinding helical inserts into metric fine-thread, right-hand holes. It ensures proper insert alignment before final installation. Commonly used in applications requiring thread repair or reinforcement in various industrial settings
HELI-COIL
The HELI-COIL Prewinder Type II is a steel installation tool designed for prewinding helical inserts into metric fine-thread, right-hand holes. It ensures proper insert alignment before final installation. Commonly used in applications requiring thread repair or reinforcement in various industrial settings
Threaded mandrel tool for installing steel helical inserts into pre-tapped holes. Designed for right-hand coarse inch threads. Used in industrial maintenance and manufacturing to create or repair threaded connections in softer materials
HELI-COIL
Threaded mandrel tool for installing steel helical inserts into pre-tapped holes. Designed for right-hand coarse inch threads. Used in industrial maintenance and manufacturing to create or repair threaded connections in softer materials
Steel installation tool for prewinding helical inserts into metric coarse right-hand threads. Designed for use with HELI-COIL brand inserts. Used in thread repair and reinforcement applications
HELI-COIL
Steel installation tool for prewinding helical inserts into metric coarse right-hand threads. Designed for use with HELI-COIL brand inserts. Used in thread repair and reinforcement applications
This steel installation tool is used to prewind helical inserts into right-hand fine metric threads. It is designed for thread repair or reinforcement applications where helical inserts are required
HELI-COIL
This steel installation tool is used to prewind helical inserts into right-hand fine metric threads. It is designed for thread repair or reinforcement applications where helical inserts are required
This threaded mandrel is used to install tangless helical inserts into steel components. Designed for inch-system coarse right-hand threads, it ensures proper insert seating and alignment during repair or assembly
HELI-COIL
This threaded mandrel is used to install tangless helical inserts into steel components. Designed for inch-system coarse right-hand threads, it ensures proper insert seating and alignment during repair or assembly
This steel Prewinder Type III tool is used to prewind helical inserts into tapped holes prior to final installation. Designed for right-hand coarse inch threads, it facilitates proper thread alignment during thread repair or reinforcement in metal components
HELI-COIL
This steel Prewinder Type III tool is used to prewind helical inserts into tapped holes prior to final installation. Designed for right-hand coarse inch threads, it facilitates proper thread alignment during thread repair or reinforcement in metal components