Osg 2885301 Spiral Point Tap 8-32 Unc Plug Hss

Product Description

The OSG 2885301 is a spiral point tap designed for cutting internal threads in through-hole applications. It features an 8-32 UNC thread form with a plug chamfer, 2 flutes, and a 2B class of fit to meet standard fastener tolerances. The tap is manufactured from high-speed steel and finished with a steam oxide coating that reduces friction and helps resist corrosion during use. With an H3 thread limit, it holds tight dimensional consistency for production threading work. Licensed machinists, maintenance technicians, and metalworking trades use this tap for tapping ferrous and non-ferrous materials in general-purpose and production environments.

This tap is suited for through-hole tapping in aluminum, cast aluminum, low-carbon steel, and medium-carbon steel. The spiral point design pushes chips forward ahead of the cutting zone, making it well-suited for continuous-feed and CNC tapping operations where chip evacuation is critical. Its compact overall length of 2.125 inches makes it practical in benchtop drill presses, CNC machining centers, and hand-tap handles on production floors and field service work.

Key Features

• 8-32 UNC thread form with 2B class of fit for standard fastener compatibility
• Plug chamfer for standard through-hole tapping entry
• H3 thread limit for consistent dimensional accuracy across production runs
• Steam oxide coating reduces friction and provides light corrosion resistance
• Spiral point geometry pushes chips forward for clean through-hole threading
• Right-hand thread direction; no coolant-through requirement

Compatibility

Rated for use in aluminum, cast aluminum, low-carbon steel, and medium-carbon steel. Designed as a standard 8-32 UNC spiral point tap suitable for use in manual tap handles, drill press setups, and CNC tapping applications that accept straight-shank taps with a 0.168-inch shank diameter.

Installation Notes

This tap is installed and operated by machinists or maintenance technicians familiar with threading operations. Before tapping, ensure the workpiece is secured and the pilot hole is drilled to the correct tap drill size for 8-32 UNC. Apply appropriate cutting fluid for the material being tapped. When used in powered equipment, verify spindle speed and feed rate are appropriate for the material and tap size to avoid breakage.