Osg 1212801 Spiral Point Tap 8-32 Unc Hss Oxide

Product Description

The OSG 1212801 is a spiral point tap designed for cutting right-hand internal threads to the 8-32 UNC standard. Built from high-speed steel with a steam oxide coating, it delivers reliable performance in a wide range of ferrous and non-ferrous materials. The plug chamfer provides a gradual thread lead-in suited for through-hole tapping applications. With a 2-flute design and an H3 thread limit, this tap holds close tolerances for 2B class of fit threads. Overall length is 2.125 inches, with a thread length of 0.39 inches and a shank diameter of 0.168 inches. It is used by machinists, maintenance technicians, and metalworking tradespeople across industrial and commercial settings.

This tap is appropriate for through-hole tapping in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. The plug chamfer style makes it a standard choice when the workpiece allows the tap to pass fully through the material. It suits benchtop drill presses, CNC tapping machines, and hand-tapping operations where a guided tap wrench is used. The 8-32 UNC thread size is commonly encountered in sheet metal, electrical enclosures, electronic assemblies, and light mechanical fastening applications.

Key Features

• 8-32 UNC right-hand thread form for standard unified coarse pitch applications
• High-speed steel construction provides hardness and wear resistance across a broad material range
• Steam oxide coating reduces friction and provides mild corrosion resistance during storage and use
• Plug chamfer with 2-flute geometry suited for through-hole tapping
• H3 thread limit maintains 2B class of fit tolerances
• No coolant-through requirement simplifies setup for manual and light CNC use

Compatibility

Designed as an OEM-style cutting tool replacement for spiral point plug taps in the 8-32 UNC size, part of the OSG Series 105 tap line.

Installation Notes

Tapping operations should be performed by a qualified machinist or maintenance technician familiar with proper speeds and feeds for the workpiece material. Secure the workpiece fully before tapping and ensure the tap is properly aligned to avoid thread crossings or tap breakage. Always apply an appropriate cutting fluid or tapping compound for the material being threaded. Follow shop safety procedures and machine manufacturer guidelines when using power tapping equipment.