Osg 1232408 Spiral Point Tap 1/2-13 Unc Ticn Hss

Product Description

The OSG 1232408 is a spiral point tap designed for cutting 1/2-13 UNC threads in through-hole applications. It features a plug chamfer, three flutes, and a right-hand thread direction with an H3 thread limit and 3B class of fit. The tap is manufactured from high-speed steel and finished with a titanium carbonitride (TiCN) coating, which improves wear resistance and reduces heat buildup during cutting. Overall length is 3.375 inches with a thread length of 0.941 inches and a shank diameter of 0.367 inches. Machinists and tool-and-die professionals use this tap in production and maintenance machining environments.

This tap is suited for through-hole threading operations in a wide range of materials including aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. The spiral point geometry pushes chips forward ahead of the cutting zone, making it well suited for production runs and CNC tapping where through-holes allow chip evacuation. It belongs to OSG Series 105 and does not require coolant-through capability, making it compatible with standard tapping setups.

Key Features

• Spiral point geometry pushes chips forward for efficient through-hole tapping
• TiCN coating improves surface hardness and extends tool life across abrasive materials
• High-speed steel construction handles a broad range of ferrous and non-ferrous workpiece materials
• H3 thread limit and 3B class of fit for standard tolerance through-hole threads
• Plug chamfer (3-5 thread lead) for general-purpose starting in pre-drilled through holes
• No interrupted thread geometry and no coolant-through requirement simplifies setup

Compatibility

Designed for cutting 1/2-13 UNC right-hand threads in through-hole applications across aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel workpieces.

Installation Notes

This tap is installed and operated by machinists using a standard tap wrench, tapping head, or CNC rigid tapping cycle. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill diameter for 1/2-13 UNC before beginning the tapping operation. Apply an appropriate cutting fluid for the workpiece material to reduce friction and extend tap life. Inspect the tap for wear or chipping before each use and replace if cutting edges show deterioration.