Eagle Cutting Tool CHD-35000-4-I Carbon Hex Rethread Die

Product Description

The EAGLE CUTTING TOOL CHD-35000-4-I is a carbon hex rethread die sized for 3-1/2 inch diameter threads at 4 threads per inch (TPI). Hex rethread dies are used to restore damaged, corroded, or deformed external threads on bolts, rods, and threaded pipe or fittings without requiring full thread cutting. The hex body allows a standard open-end or adjustable wrench to drive the die, making it practical for field and shop use alike. At 9.35 pounds, this is a substantial die suited for heavy-diameter thread restoration work performed by plumbers, pipefitters, and mechanical contractors.

This die is appropriate for restoring large-diameter external threads encountered in industrial piping, heavy mechanical assemblies, and structural threaded rod applications. The 3-1/2 inch by 4 TPI specification corresponds to coarse thread profiles common in large-diameter pipe and heavy fastener applications. It is typically used in commercial and industrial settings where thread damage from corrosion, impact, or overtorquing requires on-site remediation rather than full component replacement.

Key Features

• 3-1/2 inch diameter, 4 TPI thread specification for large-diameter thread restoration
• Hex body design accepts open-end or adjustable wrench for controlled torque application
• Carbon construction provides hardness suitable for restoring threads on steel and iron fasteners
• Rethread design cleans and restores existing threads rather than cutting new ones
• Minimum order quantity of 1 — available as a single unit

Compatibility

Designed for use on external threads with a 3-1/2 inch nominal diameter and 4 TPI thread pitch. Suitable for restoring coarse external threads on bolts, threaded rod, and pipe fittings within that specification.

Installation Notes

This tool is used by pipefitters, plumbers, and mechanical tradespeople performing thread restoration in the field or shop. Before use, clean the damaged thread area of debris, rust, and scale. Apply cutting oil to the thread and die to reduce friction and extend die life. Drive the die slowly with steady, even pressure using a properly sized wrench to avoid cross-threading or further thread damage.

Technical Specifications

• Thread Diameter: 3-1/2 inches
• Thread Pitch: 4 TPI
• Die Type: Hex Rethread
• Material: Carbon
• Weight: 9.35 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: CHD-35000-4-I