Osg 1214200 Spiral Point Tap 12-24 Unc 2 Flute Hss

Product Description

The OSG 1214200 is a spiral point tap designed to cut 12-24 UNC threads in through-hole applications. It features a 2-flute, plug chamfer geometry that pushes chips forward ahead of the cutting action, reducing clogging and improving thread quality in production environments. Built from high-speed steel (HSS) with a bright finish, it delivers consistent performance across a wide range of workpiece materials. The overall length is 2.375 inches and the thread length is 0.52 inches, with an H3 thread limit and a 2B/3B class of fit. Right-hand thread direction. Installed by machinists and maintenance technicians in manual and CNC tapping operations.

This tap is suited for through-hole tapping in both light and heavy manufacturing settings. Its spiral point design makes it particularly effective in high-volume production where chip evacuation is a priority. The 12-24 UNC thread form is common in fastener and fixture applications across general metalworking, HVAC equipment assembly, and industrial maintenance. The H3 tolerance ensures compatibility with standard 2B and 3B fit requirements used in precision assemblies.

Key Features

• Spiral point geometry pushes chips forward, ideal for through-hole tapping
• 12-24 UNC thread form, right-hand direction, H3 thread limit
• 2B/3B class of fit for standard precision assemblies
• High-speed steel construction for broad material compatibility
• Bright finish, no coating - suitable for use with cutting fluids
• Plug chamfer for easy thread entry and progressive cutting load

Compatibility

Compatible with aluminum, cast aluminum, cast iron, hardened steel, high-carbon steel, low-carbon steel, and medium-carbon steel workpieces. Designed for use in standard 12-24 UNC tapping applications requiring a plug-style spiral point tap with H3 tolerance.

Installation Notes

Install in a tap wrench, tapping head, or CNC rigid tapping chuck as appropriate for the application. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill size for 12-24 UNC before tapping. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread finish. Do not reverse the tap to break chips - the spiral point design clears chips by advancing them forward through the hole.