Osg 1611801 Spiral Point Tap 8-32 Unc Hss Oxide

Product Description

The OSG 1611801 is a spiral point plug tap designed for cutting 8-32 UNC right-hand threads in through-hole applications. Made from high-speed steel with a steam oxide coating, it handles heat and wear across a wide range of materials. The spiral point geometry pushes chips ahead of the tap and into the hole, keeping the flute area clear during the cut. At 2.125 inches overall length with a 0.39-inch thread length and H3 thread limit, this tap holds consistent tolerances for a 2B class of fit. Licensed HVAC technicians, machinists, and trade professionals reach for this tap when threading small fastener holes in production or repair work.

This tap is suited for threading 8-32 UNC holes in a broad range of materials including low-carbon steel, medium-carbon steel, high-carbon steel, hardened steel, cast iron, aluminum, and cast aluminum. The plug chamfer makes it the right choice for through-hole threading where chip ejection forward is acceptable. It is commonly used in HVAC, plumbing, electrical, and general fabrication shops where 8-32 machine screw threads are standard.

Key Features

• 8-32 UNC thread form with H3 thread limit for 2B class of fit tolerances
• Spiral point geometry pushes chips forward, reducing clogging in through-hole cuts
• High-speed steel construction handles a wide range of ferrous and non-ferrous materials
• Steam oxide coating improves lubricity and corrosion resistance during cutting
• Plug chamfer for standard through-hole threading applications
• Right-hand cut, 2-flute design with no coolant-through requirement

Compatibility

Designed for threading 8-32 UNC through holes in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel workpieces.

Installation Notes

This tap is installed by machinists or qualified trade professionals using a tap wrench, tapping handle, or machine spindle rated for the tap size. Always use appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Secure the workpiece before tapping to prevent movement. Inspect the tap for chipping or wear before each use, and replace if damaged to avoid thread damage or tap breakage in the hole.