Value Collection 81946219 Round Die 3-56 Unf Hss Left Hand

Product Description

The VALUE COLLECTION 81946219 is a round threading die machined from high-speed steel (HSS) and designed to cut external left-hand threads in the 3-56 UNF specification. It features an adjustable design that allows the machinist to fine-tune cutting diameter for precise thread fit or to take multiple passes when cutting harder materials. Left-hand thread dies are used wherever reverse-thread fasteners are required to prevent loosening under rotational loads. This die is suited for use in machine shops, maintenance facilities, and field service environments where thread restoration or fabrication work is performed by machinists, tool-and-die technicians, and skilled tradespeople.

This die is appropriate for cutting 3-56 UNF left-hand external threads on small-diameter fasteners, shafts, and threaded rod stock. Typical applications include instrument assembly, precision mechanical assemblies, and specialty fastener fabrication where standard right-hand threads are not acceptable. The HSS construction handles a wide range of ferrous and non-ferrous materials at moderate cutting speeds without premature edge wear.

Key Features

• High-speed steel construction provides wear resistance across ferrous and non-ferrous workpieces
• Left-hand thread direction for reverse-thread fastener applications
• Adjustable design allows fine-tuning of thread fit and multi-pass cutting
• 3-56 UNF thread specification for small-diameter precision threading work
• Round die form fits standard die stocks and die holders

Compatibility

Designed as a standard round die for use with compatible die stocks and holders sized for the die's outer diameter. Cuts 3-56 UNF left-hand external threads on suitable workpiece materials.

Installation Notes

This die is installed and operated by machinists and skilled tradespeople using a standard die stock or die holder. Secure the workpiece firmly before threading and apply appropriate cutting fluid to extend die life and improve thread finish. Start the die square to the workpiece axis to avoid cross-threading. Inspect the die for wear or chipping before each use and replace if cutting edges are damaged.