Osg 2836801 Spiral Point Tap 3/8-24 Unf Plug Hss

Product Description

The OSG 2836801 is a spiral point tap designed for cutting right-hand internal threads to a 3/8-24 UNF specification. It features a plug chamfer and three flutes, driving chips forward through the hole during threading. The tap is manufactured from Vanadium High Speed Steel (HSS-E) for extended tool life in demanding materials and carries a steam oxide coating that improves lubricity and reduces friction at the cutting edges. At 2.937 inches overall length with a 0.74-inch thread length and a 0.381-inch shank diameter, it fits standard tap holders and machines used in precision threading work. This tap is installed by machinists, toolmakers, and maintenance technicians working in metal fabrication and repair environments.

This tap is suited for threading through-holes and blind holes in a range of ferrous and non-ferrous materials. It performs in aluminum, low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, die steel, stainless steel, and cast iron. The spiral point design makes it particularly effective in through-hole applications where chips can be pushed ahead of the cutting zone. Typical applications include machine shop production, MRO threading operations, and component repair across industrial and manufacturing settings.

Key Features

• 3/8-24 UNF thread form with 2B class of fit for standard tolerance threading
• Plug chamfer (3-5 thread lead) for general-purpose through-hole and deeper blind-hole starting
• Three-flute spiral point geometry pushes chips forward, reducing clogging in through-hole applications
• Vanadium HSS-E construction provides increased wear resistance over standard M2 high speed steel
• Steam oxide coating reduces friction and improves chip flow at the cutting face
• H4 thread limit for controlled oversize fit within 2B tolerance range

Compatibility

Designed as a standard replacement or production spiral point tap for any application requiring 3/8-24 UNF internal threads at a 2B class of fit in the material types listed above.

Installation Notes

This tap is intended for use by trained machinists and metalworking professionals. Always secure the workpiece and ensure proper alignment in a tap wrench, drill press, or CNC tapping cycle before engaging the tap. Apply cutting fluid appropriate for the workpiece material to extend tap life and improve thread quality. Inspect the tap for wear or chipping before each use and replace if cutting edges are damaged to avoid thread damage or tap breakage.