Osg 1400100205 Thread Forming Tap 0-80 Unf Cobalt Tin

Product Description

The OSG 1400100205 is a thread forming tap designed for 0-80 UNF internal threads in blind hole applications. Part of the HY-PRO NRT series, it uses a modified bottoming chamfer with 2 to 2.5 chamfered threads, allowing threading close to the bottom of a blind hole. The tap is manufactured from cobalt high-speed steel and features a titanium nitride (TiN) coating, providing increased surface hardness and extended tool life in demanding materials. At 1.6913 inches overall length with a shank diameter of 0.1410 inches, this tap is sized for precision small-diameter work. It carries a Class 3B fit with an H2 thread limit, making it suitable for tight-tolerance threaded assemblies.

This tap is suited for machining operations in manufacturing, toolroom, and maintenance environments where fine 0-80 UNF threads are required in blind holes. It is appropriate for use in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces. The right-hand thread direction and modified bottoming chamfer make it a practical choice for close-tolerance blind hole threading where thread depth is critical. Machinists and tool-and-die professionals working with small fastener threads will find this tap sized for precision fixture and instrument work.

Key Features

• 0-80 UNF thread form with right-hand direction and Class 3B fit, H2 thread limit
• Modified bottoming chamfer with 2 to 2.5 chamfered threads for threading near the bottom of blind holes
• Cobalt high-speed steel construction for performance in hardened and stainless steel
• TiN coating increases surface hardness and reduces wear in abrasive materials
• Thread forming design displaces material rather than cutting, producing stronger threads with no chip generation
• Compatible material applications include alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel

Compatibility

Designed for blind hole threading operations requiring 0-80 UNF threads in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces, per material application codes P and N.

Installation Notes

This tap should be installed and operated by qualified machinists familiar with small-diameter tapping procedures. Power down all equipment before changing tooling. Use appropriate tapping fluid or cutting compound recommended for the workpiece material, particularly when tapping stainless or hardened steel. Ensure the tap is properly aligned with the pilot hole to prevent breakage, which is a significant risk at this small diameter.