The OSG UNC Spiral Flute Threading Tap is a precision tool built for machinists who demand reliable, accurate internal threads in blind holes. Crafted from HSS-E cobalt and finished with a durable steam oxide coating, it delivers excellent wear resistance and long tool life in demanding materials.

• Size & Thread: 1-1/4 in diameter, 7 UNC threads per inch (right-hand) for standard fastener compatibility
• Material: High-speed steel with cobalt (HSS-E) for enhanced hardness and heat resistance
• Flute Design: Spiral flute geometry designed for efficient chip evacuation in blind holes
• Coating: Steam Oxide coating to reduce friction and improve wear resistance
• Application: Optimized for internal blind-hole threading in steel, cast iron, and alloyed materials

With this tap, you can expect clean, accurate threads on critical components, extended tool life from the cobalt-enhanced alloy, and smoother cutting action thanks to efficient chip flow. The combination of spiral flutes and the steam oxide finish helps maintain performance in deeper holes, making it well-suited for production runs and precision assemblies alike.