Value Collection JY4913208 Straight Flute Tap 7/16-20 Unf

Product Description

The VALUE COLLECTION JY4913208 is a straight flute plug tap designed for cutting 7/16-20 UNF internal threads in a left-hand direction. Manufactured from high-speed steel with a bright, uncoated finish, this tap delivers reliable thread-cutting performance in a range of common workpiece materials. It features 4 flutes and an H3 thread limit, which provides a controlled tolerance for consistent thread fit. With an overall length of 3-5/32 inches, it is sized for standard machine or hand tapping operations. Machinists, toolroom technicians, and maintenance professionals use this tap where a left-hand thread specification is required.

This tap is suited for applications in general machining, maintenance, and repair operations where 7/16-20 UNF left-hand threads are specified. Left-hand taps are commonly used in applications where reverse-torque conditions would otherwise loosen a standard right-hand fastener, such as certain spindle assemblies, bicycle components, and mechanical linkages. The plug chamfer style provides a gradual lead-in of approximately 3 to 5 threads, making it appropriate for through-hole tapping as well as semi-blind applications with adequate chip clearance.

Key Features

• 7/16-20 UNF thread form with left-hand thread direction for reverse-torque applications
• Plug chamfer with approximately 3 to 5 thread lead-in for controlled thread engagement
• 4 straight flutes suited for tapping shorter-chipping materials
• H3 thread limit for consistent tolerance fit on mating fasteners
• High-speed steel construction for durability across a range of workpiece materials
• Bright, uncoated finish — no additional coating to alter dimensional tolerance

Compatibility

Designed as a standard replacement or supplemental tap for any machining or maintenance setup requiring a 7/16-20 UNF left-hand internal thread. Fits standard tap holders and chucks accepting this shank size.

Installation Notes

This tap should be installed in a compatible tap holder or chuck rated for the shank diameter before use. Ensure the workpiece is securely fixtured and that the correct cutting fluid or tapping compound is applied for the material being threaded. Because this is a left-hand tap, rotation direction must be reversed from standard tapping procedure — confirm machine or hand tap wrench direction before engaging the thread. Inspect the tap for wear or chipping before each use to avoid thread damage or tap breakage in the workpiece.