Osg 1400100105 Thread Forming Tap 0-80 Unf Bottoming Cobalt

Product Description

The OSG 1400100105 is a thread forming tap designed for cold-forming internal threads without cutting, eliminating chips and reducing the risk of tap breakage in blind hole applications. Built from cobalt high-speed steel and finished with a titanium nitride (TiN) coating, this tap delivers extended tool life and improved resistance to heat and wear. It is configured as a bottoming chamfer with 1.5 to 2 chamfered threads, allowing threads to be formed close to the bottom of a blind hole. At 0-80 UNF, it produces fine unified threads in small-diameter applications. Overall length is 1.6913 inches with a shank diameter of 0.1410 inches. This tap is part of the HY-PRO NRT series and is sized for precision machining and assembly work.

This tap is suited for threading blind holes in a range of metallic workpiece materials including alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel. It is commonly used in precision manufacturing, instrument assembly, and aerospace or electronics fabrication where small UNF threads are required. The bottoming configuration makes it well-suited for applications where thread depth must extend near the base of a drilled hole and a standard or plug chamfer cannot reach. Machinists and tool-and-die professionals working with tapping machines, CNC machining centers, or hand-held tapping equipment will find this tool appropriate for high-accuracy, fine-thread work.

Key Features

• Thread forming (chipless) design prevents chip buildup in blind holes and reduces tap breakage risk
• Cobalt HSS construction provides elevated heat resistance compared to standard M2 HSS taps
• TiN coating improves surface hardness and reduces friction during the tapping cycle
• Bottoming chamfer with 1.5 to 2 chamfered threads allows threading close to the bottom of blind holes
• H3 thread limit and Class 2B fit for consistent, controlled thread tolerance output
• Right-hand thread direction, compatible with standard tapping setups

Compatibility

Designed as an OEM-style thread forming tap for blind hole threading applications in materials coded P and N, corresponding to steels and non-ferrous metals, as specified by the manufacturer for the HY-PRO NRT series.

Installation Notes

Thread forming taps require a properly sized forming tap drill hole, which differs from a standard cut tap drill size and must be selected according to the specific material and thread specification. Secure the tap in a tapping chuck or rigid holder with appropriate torque control to avoid overloading the small shank at this diameter. Always apply a suitable cutting or tapping fluid for the workpiece material before tapping. Follow applicable machine safety procedures and ensure the workpiece is securely fixtured before beginning the tapping cycle.