The OSG UNF Spiral Flute Threading Tap (No. 3 x 56) is a high-precision internal-threading tool designed for blind-hole applications. Built for precision shops and professional machinists, it combines durable HSS-E material with a steam-oxide coating to deliver reliable, accurate UNF threads and extended tool life.

• Thread Type & Size: UNF spiral-flute threading tap, No. 3 x 56, optimized for blind-hole threading.
• Material: HSS-E (high-speed steel with cobalt) for exceptional heat resistance and longevity in demanding materials.
• Coating: Steam oxide coating enhances wear resistance and provides improved corrosion protection in tough cutting environments.
• Flute Design: Spiral flute geometry facilitates efficient chip evacuation, reducing buildup in confined blind holes.
• Application: Specifically engineered for blind-hole threading to achieve consistent, high-quality threads.

This tapping solution delivers clean, accurate threads with reduced rework and longer tool life, making it suitable for production runs, repair work, and precision assemblies. The combination of HSS-E strength, steam-oxide protection, and a spiral flute improves heat management and debris removal, ensuring dependable performance in challenging materials and tight spaces. For best results, pair with appropriate cutting fluid and steady feed to maximize thread quality and tool longevity across multiple holes.