The OSG UNC Spiral Flute Threading Tap is engineered for precise, reliable threading in blind holes. Crafted from cobalt-enhanced HSS-E and finished with a durable steam oxide coating, it’s built to handle demanding machining tasks with consistency.

• Size & Thread: 1/4-20 UNC threading tap designed for standard blind-hole applications.
• Material: HSS-E (high-speed steel with cobalt) for improved heat resistance and edge retention.
• Coating: Steam oxide coating provides wear resistance, reduced friction, and extended tool life.
• Flute Design: Spiral flute aids in fast, efficient chip evacuation in blind holes.
• Application: Optimized for blind-hole threading, delivering clean, accurate threads with fewer passes.
• Brand & Quality: OSG precision threading taps, trusted for consistent performance across industrial tasks.

With this tap, users gain dependable, high-quality threads that meet exacting standards. The cobalt-enhanced HSS-E core stands up to heat and wear, while the steam oxide finish reduces galling and extends life in tough materials. The spiral flute design minimizes chip buildup in restricted blind-hole environments, decreasing the risk of tap breakage and rework. Whether building prototypes, repairing equipment, or performing routine fabrication, this tool helps you achieve accurate threads, fewer tool changes, and longer intervals between maintenance.