The OSG UNF Spiral Flute Threading Tap is a precision tool designed for machinists who need reliable, fine-pitch threads in blind holes. Crafted for durability and consistent performance, it combines advanced materials and coating to deliver superior results in demanding applications.

• Thread format: 1-1/4" x 12 UNF (Unified National Fine) threading for precise, small-pitch taps.
• Material: HSS-E cobalt alloy (high-speed steel with cobalt) for enhanced hardness and wear resistance.
• Coating: Steam Oxide coating to improve surface hardness and provide better lubrication retention during cutting.
• Flute design: Spiral flute geometry optimized for efficient chip evacuation in blind-hole threading, reducing binding and breakout.
• Application: Ideal for creating clean, accurate threads in blind holes across ferrous and alloyed metals where access is limited.
• Durability: Built to withstand repeated use in tough materials, offering extended tool life and reliable performance under heat.

This tap helps you achieve consistent thread quality with reduced insert wear and fewer reworks. The combination of HSS-E cobalt and steam-oxide coating supports longer life in high-heat machining, while the spiral flute design ensures chips are cleared efficiently in deep, restrictive holes. Whether you're rebuilding a component or fabricating precision parts, this UNF tap delivers dependable, precise threads that you can trust from setup to finish.