The OSG UNC Spiral Flute Threading Tap is engineered for precise internal threading in blind holes, delivering dependable performance for professional machining tasks. Crafted from HSS-E cobalt and finished with a Steam Oxide coating, it combines durability with efficient cutting action for long-lasting accuracy.

• Thread Size: UNC 1 x 8
• Material: HSS‑E (high-speed steel with cobalt) for enhanced heat resistance and longevity
• Coating: Steam oxide coating provides wear resistance and reduced friction
• Flute Design: Spiral flute facilitates efficient chip evacuation in blind holes
• Application: Ideal for internal threading in blind-hole applications
• Quality: OSG precision threading tap engineered for accurate thread form and extended tool life

Designed for repeatable, high-quality results, this tap creates clean UNC threads with minimal chatter and reliable performance across challenging materials. The spiral flute reduces chip buildup in deep, restricted holes, while the HSS‑E cobalt core and Steam Oxide coating resist wear and heat, helping the tap last longer between regrinds or replacements. Whether you’re performing production runs or on-demand repairs, this tap supports consistent thread quality and operational efficiency.