Value Collection MSC-04914156 Straight Flute Tap 1/2-13

Product Description

The VALUE COLLECTION MSC-04914156 is a straight flute tap designed to cut internal left-hand threads in a 1/2-13 UNC profile. Built from high-speed steel with a bright, uncoated finish, it runs a taper chamfer to ease thread entry and reduce start-up torque. The H3 thread limit holds tight tolerance control for 3B class of fit applications where thread fit and function are critical. This tap is intended for use by machinists, tool-and-die makers, and maintenance technicians working on parts that require left-hand threaded fastener engagement.

This tap suits manual and machine tapping operations on a range of materials where left-hand thread orientation is required by design. The taper chamfer makes it a practical choice for through-hole applications and blind holes with adequate depth clearance. With a thread length of 1-21/32 inches and an overall length of 3-3/8 inches, it fits standard tap holders and CNC tapping chucks sized for 1/2-inch tooling. Typical applications include repair threading, fixture building, and production work requiring left-hand UNC threads.

Key Features

• Left-hand 1/2-13 UNC thread form for applications requiring reverse thread orientation
• Taper chamfer distributes cutting load across multiple leading threads for controlled thread entry
• 4-flute straight flute geometry provides chip clearance and cutting stability
• H3 thread limit ensures 3B class of fit for functional thread assemblies
• High-speed steel construction offers durability across a range of workpiece materials
• Bright uncoated finish allows direct inspection of tool condition and edge wear

Compatibility

Designed as a direct-use tap for any application requiring a 1/2-13 UNC left-hand internal thread at a 3B class of fit with H3 thread limit tolerance.

Installation Notes

This tap is installed and operated by machinists using standard tap wrenches, T-handle holders, or power tapping heads with appropriate torque limiting. Always secure the workpiece firmly and align the tap perpendicular to the hole before starting the cut. Apply cutting fluid appropriate to the workpiece material to reduce heat and extend tool life. Inspect flutes and cutting edges before each use and replace the tap if chipping or wear is observed.