The OSG UNF Spiral Flute Threading Tap in 5/8 x 18 UNF is built for precise blind-hole threading, delivering clean, accurate threads in challenging metals. Designed for professionals who need dependable performance in critical machining tasks.

• Thread Type and Size: UNF spiral flute threading tap, 5/8" diameter with 18 TPI (5/8 x 18 UNF)
• Material: HSS-E (high-speed steel with cobalt) for enhanced hardness and heat resistance
• Coating: Steam oxide coating that boosts wear resistance and lubricity
• Flute Design: Spiral flutes optimize chip evacuation, reducing binding in blind-hole applications
• Application: Specifically suited for blind-hole tapping in metal workpieces
• Performance: Consistent, accurate thread formation with extended tool life

With its cobalt-enriched HSS and durable steam oxide coating, this tap maintains cutting efficiency under heat and wear, helping you achieve reliable internal threads even in tougher materials. The spiral flute design enhances chip evacuation, minimizing heat buildup and reducing the chance of thread distortion in blind holes. Ideal for machine tapping in automotive, aerospace, and general manufacturing environments, the OSG UNF Spiral Flute Threading Tap supports repeatable results, lowers rework, and helps you complete critical assemblies with confidence.