Heli-coil 7571-3B Thread Insert Tool 10-24 Unc

Product Description

The HELI-COIL 7571-3B is a hand installation tool designed for driving tangless thread inserts into pre-tapped holes. It is compatible with 10-24 UNC thread sizes and is used to seat wire thread inserts flush and square without the need for a breakoff tang. The tool engages the insert drive notch directly, allowing controlled, torque-sensitive installation by hand. Machinists, maintenance technicians, and field service professionals use this tool when repairing or reinforcing threaded holes in metal, plastic, or composite materials across a range of industrial and trade applications.

This tool is used wherever tangless HELI-COIL inserts are installed in 10-24 UNC tapped holes. Common applications include thread repair on equipment housings, structural components, and fastener bores in HVAC equipment, electrical enclosures, and mechanical assemblies. It is suited for both production line use and field repair scenarios where a powered installation tool is not practical or available.

Key Features

• Designed for tangless insert installation - no tang breakoff step required after seating
• Sized for 10-24 UNC thread inserts
• Hand-operated for controlled torque application in tight or sensitive assemblies
• Engages insert drive notch directly for accurate, flush seating
• Lightweight at 0.6 pounds for easy one-handed use

Compatibility

Designed for use with tangless HELI-COIL thread inserts in 10-24 UNC thread size. Compatible with hand installation of tangless insert series requiring a 10-24 minimum thread size per UNC thread standard.

Installation Notes

This tool is installed by hand and requires no power source. Ensure the receiving hole has been tapped to the correct HELI-COIL tap size for a 10-24 UNC insert before use. Do not use with tang-style inserts, as the drive mechanism is specific to the tangless design. Follow the insert manufacturer's installation sequence and inspect the seated insert for full engagement before reassembly.