Eagle Cutting Tool CHD-640-I 6-40 Nf Hex Rethreading Die

Product Description

The EAGLE CUTTING TOOL CHD-640-I is a 6-40 NF carbon steel hex rethreading die designed to chase, clean, and restore damaged or corroded external threads without cutting new material. The hex body allows a standard wrench or die stock to drive the tool, making it practical for field repairs and bench work. At 1.96 pounds, the die is built for repeated use in trade and industrial settings. Plumbers, pipefitters, electricians, and maintenance technicians reach for rethreading dies when a fastener or threaded fitting has been damaged and replacement is not the preferred option.

This die is suited for restoring 6-40 NF unified fine thread profiles on bolts, studs, and threaded rod encountered in light mechanical assemblies, electrical enclosures, and equipment maintenance applications. The 6-40 thread size is common in instrumentation, small fasteners, and precision mechanical hardware. The import designation indicates this is a cost-effective option for shops and service vans that require a functional rethreading die without the cost of a domestic-grade tool. It is appropriate for use in both residential and light commercial service environments.

Key Features

• 6-40 NF thread form for unified fine thread restoration
• Carbon steel construction for durability across repeated use
• Hex body profile accepts standard wrenches and die stocks
• Restores damaged or corroded external threads without full re-cutting
• Compact form factor suitable for field service kits and toolboxes

Compatibility

Designed as an OEM-style rethreading die for use on 6-40 NF unified fine thread external fasteners and threaded components in light mechanical, electrical, and instrumentation applications.

Installation Notes

Rethreading dies are installed and driven by a licensed or experienced trade technician using a properly sized die stock or wrench that matches the hex body. Before chasing threads on installed equipment, de-energize electrical systems and relieve any system pressure per applicable safety codes. Apply cutting oil to the die and workpiece before use to reduce heat and extend tool life. Do not use a rethreading die as a substitute for a full cutting die when new threads are required on unthreaded stock.

Technical Specifications

• Thread Size: 6-40 NF
• Thread Type: Unified Fine (NF)
• Body Style: Hex
• Material: Carbon Steel
• Weight: 1.96 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: CHD-640-I