Osg 1413501 Spiral Flute Tap 10-32 Unf Bottoming 2B Hss

Product Description

The OSG 1413501 is a spiral flute bottoming tap designed for threading blind holes to the full depth in a wide range of metals. It carries a 10-32 UNF thread form with a right-hand thread direction and a 50-degree helix angle that efficiently evacuates chips up and out of the flute during tapping. The three-flute spiral design provides clean thread formation in both through and blind-hole applications. Ground to an H3 thread limit with a 2B class of fit, this tap delivers consistent tolerance control on production runs. An oxide coating reduces friction and extends tool life across repeated use. Overall length is 2.375 inches with a thread length of 0.511 inches and a shank diameter of 0.194 inches. It is manufactured from high-speed steel for durability in general machining environments.

This tap is suited for machine shops, maintenance facilities, and fabrication environments handling ferrous and non-ferrous materials. Stated material application includes aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel. The bottoming chamfer style makes it the correct choice when threads must extend as close as possible to the bottom of a blind hole. It is intended for use in CNC tapping centers, drill presses, or manual tapping operations where controlled feed rate is maintained. Typical users include machinists, tool-and-die makers, and maintenance mechanics performing precision threaded hole work in production or repair settings.

Key Features

• Bottoming chamfer for full-depth threading in blind holes
• 50-degree right-hand spiral flute for efficient chip evacuation
• H3 thread limit with 2B class of fit for consistent tolerance
• Steam oxide coating reduces friction and extends tool life
• Rated for aluminum, cast iron, and low-, medium-, and high-carbon steel
• High-speed steel construction for durability in production machining

Compatibility

Designed as an OEM-style replacement or direct-use spiral flute bottoming tap for machine tapping applications requiring a 10-32 UNF, 2B class of fit thread in ferrous and non-ferrous workpieces.

Installation Notes

This tap is installed and operated by machinists or maintenance mechanics using a CNC tapping center, drill press with tapping attachment, or manual tap wrench. Always secure the workpiece firmly before beginning the tapping operation, and use the appropriate cutting fluid for the workpiece material to maintain tap life and thread quality. Ensure the pilot hole diameter is correct for a 10-32 UNF thread before tapping. Never force a bottoming tap into an undersized or improperly drilled hole, as this is a primary cause of tap breakage.