Value Collection 314-4274 Round Die 3/4-16 Unf Left Hand Hss

Product Description

The VALUE COLLECTION 314-4274 is a round threading die designed to cut 3/4-16 UNF left-hand external threads on bolts, studs, and cylindrical stock. Machined from high-speed steel, it maintains cutting edge hardness through the heat generated by threading operations. The adjustable design allows the technician to fine-tune thread fit by slightly opening or closing the die body with a setscrew, accommodating minor diameter variation and extending tool life through repeated resharpening cycles. This die is used by machinists, maintenance technicians, and trade professionals who need to produce or restore left-hand threaded fasteners in the field or shop.

Left-hand threading dies are specified wherever reverse-rotation or anti-loosening thread direction is required — common applications include certain spindle assemblies, turnbuckles, pedal axles, and mechanical linkages where standard right-hand threads would back out under operational torque. The 3/4-16 UNF pitch provides fine thread engagement suited to applications requiring greater tensile strength and finer adjustment than coarse-pitch alternatives. This die is appropriate for hand-held die stocks and bench-mounted threading operations on compatible-diameter workpieces.

Key Features

• 3/4-16 UNF left-hand thread form for reverse-direction fastener production
• High-speed steel construction resists heat buildup during threading
• Adjustable die body allows thread fit tuning and extends service life
• Round die profile fits standard round die stocks and holders
• Fine-pitch UNF standard delivers stronger thread engagement than coarse-pitch equivalents

Compatibility

Designed for use in standard round die stocks sized for the die body diameter. Cuts 3/4-16 UNF left-hand external threads on compatible cylindrical stock.

Installation Notes

Secure the die firmly in a properly sized die stock before use. Apply cutting fluid to the workpiece to reduce heat and improve thread finish. Periodically back the die off to clear chips and prevent thread damage. Inspect the die for chipping or wear before each use, as a damaged cutting edge will produce out-of-tolerance threads.