Osg 1612401 Spiral Point Tap 10-32 Unf 2 Flute Hss

Product Description

The OSG 1612401 is a spiral point tap designed for cutting 10-32 UNF internal threads in a wide range of ferrous and non-ferrous materials. It features a plug chamfer and two flutes, with a right-hand thread direction and an H3 thread limit for consistent 2B class-of-fit 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. Overall length is 2.375 inches with a thread length of 0.54 inches and a shank diameter of 0.194 inches. Machinists, tool-and-die professionals, and maintenance technicians use this tap for production and repair threading applications.

The 1612401 is suited for tapping 10-32 UNF threads in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. Its spiral point geometry pushes chips forward ahead of the cutting zone, making it well-matched for through-hole applications where chip clearance is a priority. The plug chamfer provides a gradual lead-in that distributes cutting load across several threads, reducing tool stress in both manual and machine tapping setups.

Key Features

• 10-32 UNF thread form with H3 thread limit for reliable 2B class-of-fit tolerance control
• Spiral point design pushes chips forward, optimized for through-hole tapping
• Plug chamfer for gradual thread engagement and reduced cutting force
• High-speed steel construction provides toughness across a broad material range
• Steam oxide coating reduces friction and provides light corrosion resistance
• Right-hand thread direction; no coolant-through feature required for standard applications

Compatibility

Rated for use in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. Part of the OSG Series 105A tap line.

Installation Notes

Install in a tap handle, drill press, or CNC tapping head appropriate for the shank diameter of 0.194 inches. Ensure the workpiece is securely fixtured and the pilot hole diameter is correct for 10-32 UNF before starting. Apply cutting fluid appropriate to the workpiece material to extend tool life and improve thread quality. Reverse the tap periodically when hand-tapping harder materials to break chips and prevent binding.