The OSG UNF Spiral Flute Threading Tap is a high-precision tool designed for blind-hole threading, delivering clean, accurate threads with durable, long-lasting performance. Built for professionals who demand reliability in tough materials, it combines advanced metallurgy with a practical spiral flute design.

• Size: 1/2 x 20 UNF
• Material: HSS‑E (high-speed steel with cobalt) for enhanced hardness and wear resistance
• Coating: Steam oxide coating for improved durability and heat resistance
• Flute design: Spiral flute geometry optimized for efficient chip evacuation in blind-hole tapping
• Thread type: UNF threading for precise engagement in fine-thread applications
• Application: Ideal for blind-hole tapping in demanding materials and critical machining tasks
• Brand: OSG

Designed to deliver high-quality, repeatable threads, this tap pairs the toughness of HSS‑E cobalt with a steam oxide finish to extend tool life in demanding environments. The spiral flute design minimizes chip buildup and binding, enabling smoother cutting and faster cycle times in blind holes. Whether you’re building precision components, automotive parts, or aerospace-grade assemblies, this tap helps you achieve accurate threads, reduced downtime, and consistent performance across production runs.