Osg 1412401 Spiral Flute Tap 6-32 Unc Hss

Product Description

The OSG 1412401 is a spiral flute tap designed for cutting 6-32 UNC internal threads in a range of ferrous and non-ferrous materials. Built from high-speed steel with a steam oxide coating, it runs a 50-degree helix angle that efficiently evacuates chips upward out of the hole during through-hole and blind-hole tapping operations. The plug chamfer provides a gradual thread lead-in, reducing the load at thread entry. Overall length is 2 inches, with a shank diameter of 0.141 inches. Thread limit is H3, and the class of fit is 2B, making it suitable for standard unified thread tolerance applications. Right-hand thread direction, right-hand flute spiral.

This tap is suited for machine tapping in CNC machining centers, drill presses, and tapping heads used in production and maintenance environments. It performs in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The 2-flute spiral design is particularly effective in materials that produce stringy or continuous chips, where straight-flute taps would pack and risk breakage. Machinists, toolroom technicians, and maintenance mechanics working on light fastener assemblies will find this size useful for 6-32 machine screw threads.

Key Features

• 6-32 UNC thread form, 32 threads per inch, 2B class of fit
• 50-degree right-hand spiral flutes for upward chip evacuation
• Plug chamfer for gradual thread engagement and reduced entry load
• High-speed steel construction with steam oxide coating for lubricity and mild corrosion resistance
• H3 thread limit for controlled tolerance in standard 2B fit applications
• Rated for aluminum, cast iron, and low- through high-carbon steel

Compatibility

Designed for use in materials including aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel where a 6-32 UNC internal thread is required.

Installation Notes

This tap is installed by machinists and toolroom technicians using a tapping head, CNC machine, or manual tap wrench. Ensure the workpiece is securely fixtured and the tap is properly aligned to the pilot hole before engagement. Apply appropriate cutting fluid for the material being tapped. Do not reverse the tap without fully disengaging chip load, and avoid over-torquing in blind holes to prevent breakage.