Irwin Industrial Tool Co 9420ZR Hex Die 1/4-20 Nc

Product Description

The IRWIN INDUSTRIAL TOOL CO 9420ZR is a 1/4 inch by 20 National Coarse (NC) hex threading die made from carbon steel. It measures 1 inch across the hex and is designed for hand threading work across a variety of materials. This die is intended for routine maintenance and repair applications where high-accuracy tolerance is not critical, including rethreading damaged or corroded fasteners. It is a practical, compact tool that fits standard hex die stocks and can also be driven with a wrench or socket in confined spaces. Trade professionals and maintenance technicians reaching for a reliable general-purpose die will find this part a solid addition to a threading kit.

This die suits residential and light commercial maintenance scenarios where field rethreading of 1/4 inch by 20 NC fasteners is required. Common applications include HVAC, plumbing, and electrical panel work where bolts and studs need to be cleaned up or re-cut during service calls. Its hex body profile allows use with standard hex die stocks or a wrench or deep socket when clearance is limited, making it practical for tight installation environments. Package quantity is 3 dies per unit sold.

Key Features

• 1/4 inch by 20 National Coarse (NC) thread specification for common fastener sizes
• 1 inch hex body fits standard hex die stocks and is wrench- or socket-driven in tight spaces
• Carbon steel construction provides adequate hardness for general maintenance rethreading
• Suited for rethreading where high-accuracy tolerance is not critical
• Compact hex format reduces the tool footprint in confined work areas
• Sold in a package of 3 dies

Compatibility

Designed for use with standard hexagon die stocks. The 1 inch hex body can also be driven directly with a wrench or socket. Intended for hand threading applications in a variety of materials.

Installation Notes

This die is a hand threading tool intended for use by maintenance technicians and trade professionals. Before rethreading any fastener on live equipment, de-energize electrical circuits, relieve system pressure, and shut off any gas or fluid supply per applicable codes. Use appropriate cutting fluid to extend die life and produce cleaner threads. Do not use this die for applications requiring high-precision or close-tolerance threads.