HELI-COIL Threaded Mandrel Tool: Prewinder Type III, Helical Inserts
The HELI-COIL Prewinder Type III is a threaded mandrel tool for installing steel helical inserts. It is compatible with right-hand, coarse threads in inch sizes (MPN 3724-9). 3G Electric interprets demand and…
SKU 3G-OTH-531010
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Product Description
The HELI-COIL Prewinder Type III is a threaded mandrel tool for installing steel helical inserts. It is compatible with right-hand, coarse threads in inch sizes (MPN 3724-9). 3G Electric interprets demand and delivers this tool alongside genuine industrial equipment across 14 departments, with specialist depth in combustion, pumps and controls as an authorised distributor.
Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.
Frequently Asked Questions
What is the HELI-COIL Prewinder Type III used for?
The HELI-COIL Prewinder Type III is a threaded mandrel tool used to install steel helical inserts into pre-tapped holes. It is designed for right-hand, coarse inch threads (MPN 3724-9). This tool is essential for repairing or reinforcing threads in industrial machinery, automotive, and aerospace applications.
What are the specifications of the HELI-COIL Prewinder Type III?
The HELI-COIL Prewinder Type III (MPN 3724-9) is a steel installation tool for helical inserts. It is compatible with right-hand, coarse inch threads. The tool is designed for inch-system measurements and works exclusively with helical inserts. It is manufactured by HELI-COIL.
Where to buy the HELI-COIL Prewinder Type III worldwide?
3G Electric supplies the HELI-COIL Prewinder Type III (MPN 3724-9) to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery. Contact us to source this tool alongside genuine equipment across 14 industrial departments, including combustion, pumps, and controls.
How to install a helical insert with the HELI-COIL Prewinder Type III?
To install a helical insert, first drill and tap the hole to the specified inch coarse thread size. Place the insert onto the Prewinder Type III mandrel and align it with the hole. Turn the tool clockwise to wind the insert into the thread. Once seated, break off the tang using a punch. Always follow the manufacturer's instructions for torque and depth.
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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.









