The OSG UNC Spiral Flute Threading Tap is a precision tool designed for machinists who demand clean, accurate blind-hole threads in metal. Crafted from HSS-E cobalt with a Steam Oxide coating, it delivers lasting performance and dependable results for demanding threading tasks.

• Thread size: 1/2-13 UNC (Unified National Coarse) threading tap engineered for blind-hole applications.
• Material: HSS‑E cobalt high-speed steel for enhanced hardness and heat resistance during cutting.
• Coating: Steam Oxide coating to reduce wear, improve lubricity, and extend tool life in tough materials.
• Flute geometry: Spiral flute design optimized for efficient chip evacuation, helping prevent clogging in deep or blind holes.
• Application: Ideal for precision threading in blind holes within steel, alloy, and other demanding workpieces.
• Technology: Built around OSG’s advanced threading technology to deliver consistently accurate threads and reliable performance.

With this tap, you can expect steadily produced threads that meet tight tolerances, reduced rework, and longer tool life in production or repair work. The spiral flute helps keep chips moving away from the cutting edge, minimizing heat buildup and improving lifecycle in frequent threading tasks. Designed for reliability in critical machining projects, this tap supports efficient manufacturing workflows and high-quality results from the first cut to the last.