Irwin Hanson 7544ZR Round Die 1/2-13 Left Hand Unc

Product Description

The IRWIN HANSON 7544ZR is a left-hand round threading die designed to cut 1/2-13 UNC external threads on rod, bolt stock, or round bar. Made from carbon steel, it features an adjustable design that allows minor pitch diameter correction to achieve a proper thread fit. The die measures 1 inch in outside diameter and 3/8 inch in thickness, making it compatible with standard 1-inch die stocks. This tooling is used by machinists, pipefitters, plumbers, and maintenance technicians who need to cut or recut left-hand threads on fasteners or threaded rod.

This die is suited for threading mild steel, aluminum, brass, and similar machinable materials in shop or field environments. The 1/2-13 UNC specification is a coarse-thread standard commonly found in structural fasteners and industrial hardware. The left-hand thread direction makes this die specifically applicable to applications where reverse-thread fasteners are required, such as certain rotating machinery components, turnbuckles, and specialty assemblies. A die stock with a 1-inch die opening is required for proper use.

Key Features

• Left-hand thread direction for reverse-thread applications
• 1/2-13 UNC coarse-thread specification
• Adjustable design allows pitch diameter fine-tuning
• 1 inch outside diameter fits standard 1-inch die stocks
• Carbon steel construction for cutting mild steel, aluminum, and brass
• 3/8 inch thickness for secure engagement in die stock

Compatibility

Designed for use with standard 1-inch round die stocks. Fits applications requiring 1/2-13 UNC left-hand external threads on threaded rod, fasteners, or round stock.

Installation Notes

This die is installed and operated by machinists or trade professionals using a compatible 1-inch round die stock. Secure the workpiece in a vise before threading. Apply cutting oil to the die and workpiece to reduce heat and extend tool life. Left-hand dies must be turned counterclockwise to advance the thread cut; confirm thread direction before beginning work.