Osg 1400103105 Thread Forming Tap 2-64 Unf Cobalt Tin

Product Description

The OSG 1400103105 is a thread forming tap designed for cutting 2-64 UNF internal threads in blind hole applications. Part of the HY-PRO NRT series, it is manufactured from cobalt high-speed steel and features a titanium nitride (TiN) coating for improved wear resistance and tool life. The modified bottoming chamfer, with 2 to 2.5 chamfered threads, allows threading close to the bottom of a blind hole. At 1.75 inches overall length with a thread length of 0.437 inches, this tap is suited for small, precision threading work in production and maintenance environments. It is installed by machinists and tool-and-die tradespeople working with tapping machines, CNC equipment, or hand tapping setups.

This tap is rated for use in a broad range of metallic materials including alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel. Material application codes P and N confirm suitability for ferrous and non-ferrous metals. It is well suited for production shops, aerospace component work, and precision machining applications where a 2-64 UNF thread standard and Class 3B fit are required. The right-hand thread direction is standard for most tapping operations.

Key Features

• 2-64 UNF thread size with right-hand thread direction and Class 3B fit
• Modified bottoming chamfer with 2 to 2.5 chamfered threads for threading close to blind hole bottoms
• Cobalt high-speed steel construction for heat and wear resistance in tough materials
• TiN coating reduces friction and extends tool life across a wide range of workpiece materials
• Thread limit H2 for consistent thread tolerance control
• Compatible with alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel

Compatibility

Designed for blind hole threading in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces requiring a 2-64 UNF Class 3B internal thread.

Installation Notes

This tap is installed by qualified machinists using a tapping machine, CNC machining center, or manual tapping handle with appropriate torque control. Always ensure the workpiece is securely fixtured and the pilot hole diameter is correctly sized for 2-64 UNF thread forming before beginning. Use a cutting fluid or tapping compound rated for the workpiece material to reduce friction and prevent tap breakage. Cobalt taps in small diameters are brittle under side-loading — maintain proper axial alignment throughout the tapping operation.