Eagle Cutting Tool CHD-8750-9-I Hex Rethread Die 7/8-9 Nc

Product Description

The EAGLE CUTTING TOOL CHD-8750-9-I is a carbon steel hex rethread die designed to restore damaged or corroded external threads to their original specification. Built to the 7/8 inch-9 TPI National Coarse (NC) thread standard, this die is used to chase and clean existing threads on bolts, studs, and threaded rod without cutting new threads from scratch. The hexagonal body allows a standard wrench or die stock to drive the tool with controlled torque. It is a practical shop and field tool for machinists, maintenance technicians, and mechanical contractors who need to salvage fasteners rather than replace them.

This rethread die is suited for use on 7/8 inch diameter fasteners with a 9 threads-per-inch National Coarse pitch — a common size found in heavy equipment, structural steel connections, and industrial machinery. It is appropriate for both bench use in a machine shop and field repair work where a bolt or stud cannot easily be removed and replaced. The import designation indicates this die is manufactured to standard dimensional tolerances at an accessible price point for general-purpose rethreading tasks.

Key Features

• 7/8 inch diameter, 9 TPI National Coarse thread specification for compatibility with standard NC fasteners
• Carbon steel construction provides adequate hardness for rethreading mild steel and common fastener materials
• Hex body design accepts a standard wrench or die stock for controlled manual operation
• Rethreading geometry chases and restores existing threads rather than cutting full-depth new threads
• Minimum order quantity of 1 unit — suitable for single-use procurement or stocking

Compatibility

Designed for use on 7/8 inch-9 NC externally threaded fasteners including bolts, studs, and threaded rod manufactured to ANSI/ASME Unified National Coarse thread standards.

Installation Notes

A licensed machinist or qualified mechanical technician should select the correct die stock or wrench sized to the hex body before beginning work. Secure the workpiece and apply cutting oil to the die and fastener to reduce friction and extend tool life. Run the die slowly and back off periodically to clear debris when working on heavily corroded or damaged threads. This tool is intended for rethreading existing threads and is not a substitute for a full threading die when cutting new threads from unthreaded stock.

Technical Specifications

• Thread Size: 7/8 inch
• Thread Pitch: 9 TPI
• Thread Standard: National Coarse (NC)
• Die Type: Hex Rethread
• Weight: 1.96 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: CHD-8750-9-I