Osg 2402403 Straight Flute Tap 10-24 Unc Bottoming

Product Description

The OSG 2402403 is a straight flute bottoming tap designed for cutting 10-24 UNC internal threads in through-hole and blind-hole applications. Built from vanadium high-speed steel with a nitride coating, it delivers extended tool life and improved wear resistance compared to standard HSS taps. The bottoming chamfer allows threading to the full depth of a blind hole. It carries an H3 thread limit and fits Class of Fit 2B and 3B specifications. With 3 flutes and right-hand thread direction, this tap suits machine tapping operations in both manual and CNC setups. It is sold individually and is appropriate for shop and field use by machinists and maintenance technicians.

This tap is rated for use in aluminum and cast iron. The bottoming chamfer makes it well suited for blind holes where maximum thread engagement near the bottom of the hole is required. It is part of the OSG Series 240 line of straight flute taps. The 10-24 UNC thread form is a common fastener standard in light mechanical assemblies, electrical enclosures, and HVAC equipment panels, making this tap a frequent choice in trade maintenance and fabrication work.

Key Features

• Bottoming chamfer for full-depth threading in blind holes
• Vanadium high-speed steel construction for improved toughness and wear resistance
• Nitride coating extends tool life and reduces galling
• H3 thread limit for consistent tolerance control on Class 2B and 3B fits
• 3 straight flutes suitable for through and blind holes in machinable materials
• Right-hand thread direction, no coolant-through requirement

Compatibility

Rated for use in aluminum and cast iron. Designed as a machine tap for 10-24 UNC threaded holes requiring Class of Fit 2B or 3B and an H3 thread limit.

Installation Notes

This tap is installed by machinists and maintenance technicians using a tap wrench, tapping head, or CNC tapping cycle. Always ensure the workpiece is securely fixtured and the tap is properly aligned before starting the cut. Power down all equipment before any manual tap change or tool setup adjustment. Apply an appropriate cutting fluid for the workpiece material to prevent tap breakage and improve thread quality.