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HELI-COIL Threaded Mandrel Tool: Prewinder Type III, Helical Inserts - Installation Tools for Helical Inserts
HELI-COILInstallation Tools for Helical Inserts

HELI-COIL Threaded Mandrel Tool: Prewinder Type III, Helical Inserts

The HELI-COIL Threaded Mandrel Tool is a Prewinder Type III installation tool for helical inserts, designed for right-hand coarse threads in inch measurements. This steel tool (MPN 3724-20) is compatible with helical…

SKU 3G-OTH-531030

Brand
HELI-COIL
Item
Threaded Mandrel Tool: Prewinder Type III, Helical Inserts
Category
Installation Tools for Helical Inserts
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Technical Specifications

HELI-COIL
Manufacturer Part Number
3724-20
Type
Helical Inserts, Steel
Tool Type
Prewinder Type III
System of Measurement
Inch
Compatible Insert Type
Helical Inserts
Compatible Thread Type
Coarse
Compatible Thread Direction
Right Hand
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HELI-COIL Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The HELI-COIL Threaded Mandrel Tool is a Prewinder Type III installation tool for helical inserts, designed for right-hand coarse threads in inch measurements. This steel tool (MPN 3724-20) is compatible with helical inserts, enabling efficient prewinding during thread repair or reinforcement.

Frequently Asked Questions

What is the HELI-COIL Threaded Mandrel Tool Prewinder Type III used for?

The HELI-COIL Prewinder Type III tool (MPN 3724-20) is used to prewind helical inserts into tapped holes before final installation. It ensures proper thread alignment during thread repair or reinforcement in steel components, commonly applied in automotive, aerospace, and industrial maintenance.

What are the specifications of the HELI-COIL 3724-20 Prewinder Type III?

The HELI-COIL 3724-20 is a steel threaded mandrel tool, Prewinder Type III, for right-hand coarse inch threads. It is compatible with helical inserts and designed for inch-system measurements. The tool is manufactured by HELI-COIL and supports efficient prewinding during thread repair.

Where to buy the HELI-COIL Prewinder Type III tool worldwide?

3G Electric supplies the HELI-COIL Prewinder Type III tool (MPN 3724-20) worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this installation tool for helical inserts to any international destination.

How to install helical inserts using the HELI-COIL Prewinder Type III?

To install helical inserts with the HELI-COIL Prewinder Type III, first tap the hole to the correct inch coarse thread size. Attach the insert to the prewinder mandrel, then rotate the tool clockwise to wind the insert into the tapped hole. Finally, break off the tang using a tang break-off tool.

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.

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HELI-COIL Insert Installation Tool: Prewinder Type AM, Helical Inserts, Steel (MPN 2299-8). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Direction: Right Hand; Compatible Thread Type: Fine; System of Measurement: Inch; Brand: HELI-COIL; Tool Type: Prewinder Type AM.
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HELI-COIL Insert Installation Tool: Prewinder Type AM, Helical Inserts, Steel (MPN 2299-8). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Direction: Right Hand; Compatible Thread Type: Fine; System of Measurement: Inch; Brand: HELI-COIL; Tool Type: Prewinder Type AM.
HELI-COIL Threaded Mandrel Tool: Threaded Mandrel Type AM, Helical Inserts, Steel (MPN 3747-14). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Direction: Right Hand; Compatible Thread Type: Coarse; System of Measurement: Metric; Brand: HELI-COIL; Tool Type: Threaded Mandrel Type AM.
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HELI-COIL Threaded Mandrel Tool: Threaded Mandrel Type AM, Helical Inserts, Steel (MPN 3747-14). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Direction: Right Hand; Compatible Thread Type: Coarse; System of Measurement: Metric; Brand: HELI-COIL; Tool Type: Threaded Mandrel Type AM.
HELI-COIL Insert Installation Tool: Prewinder Type II, Helical Inserts, Steel (MPN 7551-3). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Direction: Right Hand; Compatible Thread Type: Coarse; System of Measurement: Inch; Brand: HELI-COIL; Tool Type: Prewinder Type II.
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HELI-COIL Insert Installation Tool: Prewinder Type II, Helical Inserts, Steel (MPN 7551-3). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Direction: Right Hand; Compatible Thread Type: Coarse; System of Measurement: Inch; Brand: HELI-COIL; Tool Type: Prewinder Type II.
HELI-COIL Threaded Mandrel Tool: Prewinder Type III, Helical Inserts, Steel (MPN 3724-9). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Direction: Right Hand; Compatible Thread Type: Coarse; System of Measurement: Inch; Brand: HELI-COIL; Tool Type: Prewinder Type III.
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HELI-COIL Threaded Mandrel Tool: Prewinder Type III, Helical Inserts, Steel (MPN 3724-9). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Direction: Right Hand; Compatible Thread Type: Coarse; System of Measurement: Inch; Brand: HELI-COIL; Tool Type: Prewinder Type III.
HELI-COIL Mandrel: Pneumantic Tool Threaded Mandrel, Helical Inserts, Steel (MPN 8757-3). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Type: Coarse; Brand: HELI-COIL; Tool Type: Pneumantic Tool Threaded Mandrel.
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HELI-COIL Mandrel: Pneumantic Tool Threaded Mandrel, Helical Inserts, Steel (MPN 8757-3). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Type: Coarse; Brand: HELI-COIL; Tool Type: Pneumantic Tool Threaded Mandrel.
HELI-COIL Insert Installation Tool: Prewinder Type AM, Helical Inserts, Steel (MPN 2299-9). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Direction: Right Hand; Compatible Thread Type: Fine; System of Measurement: Inch; Brand: HELI-COIL; Tool Type: Prewinder Type AM.
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HELI-COIL Insert Installation Tool: Prewinder Type AM, Helical Inserts, Steel (MPN 2299-9). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Direction: Right Hand; Compatible Thread Type: Fine; System of Measurement: Inch; Brand: HELI-COIL; Tool Type: Prewinder Type AM.
HELI-COIL Installation Tool: Threaded Mandrel for Tangless Inserts, Helical Inserts, Steel (MPN 7571-2B). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Direction: Right Hand; Compatible Thread Type: Coarse; System of Measurement: Inch; Brand: HELI-COIL; Tool Type: Threaded Mandrel for Tangless Inserts.
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HELI-COIL Installation Tool: Threaded Mandrel for Tangless Inserts, Helical Inserts, Steel (MPN 7571-2B). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Direction: Right Hand; Compatible Thread Type: Coarse; System of Measurement: Inch; Brand: HELI-COIL; Tool Type: Threaded Mandrel for Tangless Inserts.
HELI-COIL Mandrel: Pneumantic Tool Threaded Mandrel, Helical Inserts, Steel (MPN 8051-02). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Type: Coarse; Brand: HELI-COIL; Tool Type: Pneumantic Tool Threaded Mandrel.
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HELI-COIL Mandrel: Pneumantic Tool Threaded Mandrel, Helical Inserts, Steel (MPN 8051-02). Key specifications — Compatible Insert Type: Helical Inserts; Compatible Thread Type: Coarse; Brand: HELI-COIL; Tool Type: Pneumantic Tool Threaded Mandrel.