The OSG UNC Spiral Flute Threading Tap is a precision tool designed for professionals who need reliable 3/8-16 UNC threads in blind holes. Crafted from HSS-E with a steam oxide coating, it delivers enduring performance in demanding machining tasks.

• Thread Size: 3/8-16 UNC
• Material: HSS-E (high-speed steel with cobalt) for outstanding wear resistance and cutting performance
• Coating: Steam oxide coating to improve heat resistance and extend tool life
• Flute Design: Spiral flutes promote efficient chip evacuation in blind-hole tapping
• Application: Optimized for blind-hole threading in metal components
• Brand technology: Supported by OSG’s advanced threading capabilities for consistent, high-quality threads

With this tap, you gain precise, repeatable threads that resist wear under high cutting temperatures. The spiral-flute geometry reduces chip clogging and binding, improving tapping efficiency in tight spaces. The cobalt-enhanced HSS and steam oxide coating work together to extend tool life, decrease downtime, and deliver dependable performance across automotive, manufacturing, and general machining applications.