Value Collection JY4913141 Hand Tap 7/16-14 Unc Lh Hss

Product Description

The VALUE COLLECTION JY4913141 is a straight-flute hand tap designed for cutting left-hand internal threads in a 7/16-14 UNC thread form. Manufactured from high speed steel with a bright, uncoated finish, this tap holds a H3 thread limit, making it suitable for through-hole and blind-hole tapping where moderate tolerance control is required. The plug chamfer — typically 3 to 5 threads of lead — makes it a general-purpose choice for starting a thread in a pre-drilled hole or continuing after a taper tap. Four flutes provide adequate chip clearance for most ferrous and non-ferrous materials encountered in machine shop and maintenance applications. Overall length is 3 and 5/32 inches.

This tap is used in maintenance, repair, and manufacturing settings where left-hand threads are required — common in applications such as rotating shaft assemblies, turnbuckles, and other components designed to resist loosening under rotational loads. It is appropriate for hand-tapping operations on a bench vise or with a tap wrench. Typical users include machinists, millwrights, and maintenance mechanics working on industrial equipment, tooling fixtures, and mechanical assemblies.

Key Features

• Left-hand thread direction for applications requiring reverse-thread fasteners
• 7/16-14 UNC thread size with H3 thread limit for consistent tolerance control
• Plug chamfer provides 3 to 5 threads of lead for general-purpose through-hole and blind-hole use
• 4-flute straight flute geometry offers chip clearance in a wide range of workpiece materials
• High speed steel construction provides toughness for hand-tapping operations
• Bright, uncoated finish — no added coating to interfere with close-tolerance thread fits

Compatibility

Designed as a standard hand tap for cutting left-hand 7/16-14 UNC internal threads in pre-drilled holes sized to standard UNC tap drill charts.

Installation Notes

This tap is intended for hand-tapping with a proper tap wrench — do not use with a power driver unless the operator has direct torque feel and appropriate tooling. Ensure the workpiece is securely clamped before starting. Apply cutting fluid appropriate for the workpiece material to extend tap life and reduce the risk of tap breakage. Back the tap off periodically to break chips, particularly in blind-hole applications.