Value Collection MSC-04474136 Straight Flute Tap 1/2-13 Unc

Product Description

The VALUE COLLECTION MSC-04474136 is a straight flute tap designed to cut 1/2-13 UNC internal threads in ferrous and non-ferrous materials. Built from high-speed steel with a bright, uncoated finish, this plug chamfer tap is suited for through-hole and general-purpose tapping applications where a standard entry chamfer is required. It features 4 flutes, an H3 thread limit for a 3B class of fit, and a right-hand thread direction. The overall length is 3-3/8 inches with a thread length of 1-21/32 inches. Machinists, tool-and-die makers, and maintenance technicians use this tap for hand tapping or machine tapping in a variety of production and repair settings.

This tap is appropriate for creating 1/2-13 UNC threads in materials including mild steel, cast iron, aluminum, and plastics. The plug chamfer — typically 3 to 5 threads of taper — makes it the standard choice for through-hole applications and for following a bottoming tap in blind-hole sequences. It is well suited for job shop work, MRO maintenance, and general fabrication where a 3B class of fit is specified for standard fastener engagement.

Key Features

• 1/2-13 UNC thread form for standard unified coarse-pitch internal threads
• 4-flute straight flute geometry for balanced chip evacuation in through-hole tapping
• Plug chamfer entry for general-purpose through-hole and blind-hole follow-up applications
• H3 thread limit holds a 3B class of fit for standard fastener clearance
• High-speed steel construction provides hardness and wear resistance across a broad material range
• Bright, uncoated finish allows visual inspection of flute condition and is suitable for use with cutting fluid

Compatibility

Designed as a standard-geometry replacement or stocking tap for any application requiring a 1/2-13 UNC, 3B class of fit, plug chamfer tap in high-speed steel.

Installation Notes

Tapping should be performed by a machinist or maintenance technician familiar with thread-cutting tools and proper speeds and feeds for the workpiece material. Always secure the workpiece and align the tap perpendicular to the hole to prevent tap breakage and thread distortion. Use an appropriate cutting fluid or tapping compound for the material being threaded. Inspect flutes for chip loading and wear regularly, and reverse the tap periodically when hand tapping to break chips.