Osg 2885405 Spiral Point Tap 10-24 Unc Tin Hss

Product Description

The OSG 2885405 is a spiral point tap designed for cutting 10-24 UNC internal threads in through-hole applications. Built from high-speed steel with a titanium nitride (TiN) coating, it delivers improved wear resistance and reduced friction during cutting. The plug chamfer configuration distributes cutting forces across several leading threads, making it well suited for general-purpose through-hole tapping. With a 2-flute design and right-hand thread direction, the tap pushes chips forward ahead of the cutting action to keep the flutes clear. It measures 2.375 inches in overall length with a shank diameter of 0.194 inches, and carries a 2B class of fit with an H3 thread limit for consistent, field-standard tolerances.

This tap is intended for use in through-hole threading operations on a range of common materials including aluminum, cast aluminum, low-carbon steel, and medium-carbon steel. The TiN coating makes it a practical choice for production tapping where tool life and consistent thread quality matter. Machinists and tool-and-die technicians will find it appropriate for manual tapping, drill press setups, and CNC rigid tapping applications where a 10-24 UNC thread is required.

Key Features

• Spiral point design pushes chips forward, keeping the flute clear in through-hole cuts
• TiN coating improves surface hardness and reduces built-up edge on aluminum and steel
• High-speed steel construction handles a broad range of workpiece materials
• Plug chamfer distributes entry load across multiple threads for smooth starts
• H3 thread limit and 2B class of fit meet standard tolerance requirements for general fastener threads
• Right-hand cutting direction, compatible with standard tapping equipment

Compatibility

Rated for use in aluminum, cast aluminum, low-carbon steel, and medium-carbon steel. Produces 10-24 UNC threads with a 2B class of fit and H3 thread limit.

Installation Notes

This tap is installed by licensed machinists, tool-and-die technicians, or qualified maintenance professionals. Always secure the workpiece firmly and use appropriate tapping fluid for the material being cut. Ensure the tap is properly aligned with the pilot hole before engagement to prevent tap breakage. Follow applicable shop safety practices and equipment manufacturer guidelines for spindle speed and feed rate.