Osg 2886505 Spiral Point Tap 5-40 Unc 2 Flute Tin Hss

Product Description

The OSG 2886505 is a spiral point tap designed for through-hole threading in metalworking and light fabrication applications. Built from high speed steel (HSS) with a titanium nitride (TiN) coating, this tap cuts a 5-40 UNC right-hand thread to a 2B class of fit. The spiral point geometry pushes chips forward through the hole, reducing chip packing and maintaining clean thread formation. With an overall length of 1.93 inches and a shank diameter of 0.14 inches, the 2886505 fits standard tap holders used by machinists, maintenance technicians, and toolroom professionals working on small-diameter fastener threads.

This tap is suited for through-hole threading in low-carbon steel, medium-carbon steel, and aluminum. The plug chamfer style provides a gradual lead-in over several threads, making it appropriate for starting threads from scratch in a pre-drilled hole. It is commonly used in light manufacturing, equipment maintenance, and precision assembly work where 5-40 UNC fastener threads are required. The 2-flute design keeps the tap profile compact, which is especially useful in the small diameter range this tool occupies.

Key Features

• Spiral point geometry pushes chips forward for clean through-hole threading
• TiN coating extends tool life and reduces friction during cutting
• HSS construction handles low-carbon steel, medium-carbon steel, and aluminum
• Plug chamfer provides gradual thread lead-in for new hole tapping
• 2B class of fit meets standard tolerance requirements for general-purpose fastener threads
• Right-hand thread direction matches standard 5-40 UNC fastener orientation

Compatibility

Designed for through-hole threading applications requiring a 5-40 UNC thread form in low-carbon steel, medium-carbon steel, and aluminum workpieces.

Installation Notes

Machinists and maintenance technicians should use the correct tap drill size for a 5-40 UNC thread before starting. Apply cutting fluid or tapping oil appropriate for the workpiece material to reduce heat and extend tap life. Secure the workpiece firmly and use a calibrated tap handle or tapping head to maintain axial alignment and avoid tap breakage. Follow applicable shop safety procedures when operating drilling and tapping equipment.