The OSG UNC Spiral Flute Threading Tap is designed for precision internal threading in blind holes, delivering clean, accurate threads in demanding metalworking tasks. Built with cobalt-enhanced HSS and a durable steam oxide coating, it stands up to heat and wear in tough materials.

• Size and Thread: 1/2" diameter with 13 UNC coarse thread for standard internal threads
• Material: HSS-E (high-speed steel with cobalt) for enhanced hardness and wear resistance
• Coating: Steam oxide coating to improve heat resistance and corrosion protection
• Flute Design: Spiral flute for efficient chip evacuation in blind-hole applications
• Application: Specifically optimized for tapping internal threads in blind holes
• Technology: Leverages OSG’s advanced threading techniques for consistent, high-quality results

With the combination of a spiral flute, robust HSS-E construction, and a protective steam oxide coating, this tap delivers reliable performance across challenging metals and tight cavities. Expect smooth chip removal, reduced risk of thread damage, and longer tool life in high-production or precision-tuning environments, making it a dependable choice for accurate, repeatable internal threads.