Engineered for precision threading in blind-hole work, the OSG UNF Spiral Flute Threading Tap delivers reliable, accurate UNF threads with every cut. Designed for machinists and shops tackling critical tapping tasks, it combines advanced geometry, tough materials, and a protective coating to extend tool life and maintain consistent results.

• Size & thread type: 7/16 × 20 UNF threading for fine, high-precision taps in blind holes.
• Material & coating: HSS-E (high-speed steel with cobalt) for exceptional wear resistance and heat tolerance, finished with a Steam Oxide coating for durability and reduced friction.
• Flute design: Spiral flute geometry optimizes chip evacuation in blind-hole applications, minimizing clogging and chatter.
• Application: Ideal for threading blind holes in steel and alloy workpieces, delivering clean, accurate threads.
• Durability & finish: Hardened cutting edge plus oxide coating extend tool life under demanding tapping conditions and provide a smooth finish on finished threads.
• Usage notes: Designed for precision tapping in controlled machining environments; appropriate lubrication enhances performance and tool longevity.

With the OSG UNF Spiral Flute Threading Tap, you gain repeatable, high-quality threads and longer service life in tough tapping jobs. The spiral flute aids debris removal for clean cuts in blind holes, while the HSS-E cobalt substrate withstands higher speeds and tougher materials. The Steam Oxide coating adds protection and reduces friction, helping you achieve precise threads and reliable performance in critical manufacturing tasks.