Value Collection MSC-04489621 Straight Flute Tap 1-1/2-6 Unc

Product Description

The VALUE COLLECTION MSC-04489621 is a straight flute tap designed to cut internal 1-1/2-6 UNC threads in a variety of workpiece materials. Built from high-speed steel with a bright, uncoated finish, this taper chamfer tap features 4 flutes and a right-hand thread direction. The H4 thread limit holds tight dimensional tolerances, and the 3B class of fit suits standard commercial and industrial thread engagement. With a thread length of 3 inches and an overall length of 6.375 inches, the tool is sized for production and maintenance threading operations where accuracy and tool life are priorities.

This tap is suited for manual and machine tapping applications in fabrication shops, tool rooms, and maintenance environments. The taper chamfer distributes cutting load gradually across the leading threads, making it well-suited for starting threads in through-holes. It is a practical choice for machinists and maintenance technicians threading large-diameter holes in steel, cast iron, aluminum, and similar machinable materials where a UNC coarse-pitch thread form is specified.

Key Features

• 1-1/2-6 UNC thread form, right-hand direction
• 4 straight flutes for chip management in through-hole applications
• Taper chamfer distributes cutting forces for easier thread starting
• H4 thread limit for consistent dimensional accuracy
• 3B class of fit meets standard commercial and industrial tolerances
• High-speed steel construction with bright, uncoated finish

Compatibility

Designed as a standard replacement or production tap for applications requiring 1-1/2-6 UNC internal threads in through-hole configurations across general machining and maintenance operations.

Installation Notes

Threading operations with this tap should be performed by qualified machinists or maintenance technicians using appropriate tap handles or CNC/manual tapping equipment rated for large-diameter taps. Ensure the workpiece is securely fixtured and the tap is properly aligned to avoid thread distortion or tool breakage. Apply cutting fluid appropriate for the workpiece material to extend tool life and improve thread finish. Back off the tap periodically to break chips when threading in deeper holes.