Value Collection 314-4242 Round Die 1/4-28 Unf Left Hand Hss

Product Description

The VALUE COLLECTION 314-4242 is a round threading die designed to cut external left-hand threads in a 1/4-28 UNF thread form. Machined from high-speed steel, it delivers the hardness and wear resistance needed for production and repair threading on bolts, studs, and rod stock. The adjustable design allows the machinist to dial in thread fit by slightly compressing or expanding the die body with a set screw, providing control over thread tolerance. This die is suited for use in a standard round die stock holder and is handled by machinists, tool and die workers, and maintenance technicians performing precision threading work.

Left-hand threading dies are used wherever reverse-thread fasteners are required to prevent loosening under rotational load, such as on left-side axle spindles, turnbuckle assemblies, pedal spindles, and certain mechanical linkages. The 1/4-28 UNF thread specification is a fine-pitch unified thread commonly found in precision mechanical assemblies. This die is appropriate for both light production runs and single-piece repair applications in machine shops, maintenance facilities, and field service environments.

Key Features

• Left-hand thread direction for reverse-thread fastener applications
• 1/4-28 UNF fine-pitch thread form for precision mechanical assemblies
• High-speed steel construction provides hardness and heat resistance during cutting
• Adjustable die body allows thread fit tuning via set screw
• Round die profile fits standard round die stock holders

Compatibility

Designed as a standard round die for use in any die stock holder that accepts a round die body of matching outside diameter. Suitable for threading mild steel, aluminum, brass, and similar machinable materials in 1/4-28 UNF left-hand thread applications.

Installation Notes

A licensed machinist or experienced maintenance technician should seat this die securely in a proper round die stock before use. Apply cutting oil to the workpiece before threading to extend die life and improve thread finish. Start the die square to the workpiece to prevent cross-threading. Inspect the die for chips or cracks before each use and replace if damaged.