OSG UNC Spiral Flute Threading Tap No. 5 x 40 delivers precise internal threading for blind-hole work. Built with HSS-E cobalt and finished with a durable steam oxide coating, it combines toughness, heat resistance, and efficient chip evacuation for demanding metalworking tasks.

• Material: HSS‑E cobalt (high-speed steel with cobalt) for enhanced hardness and wear resistance under high cutting temperatures.
• Coating: Steam oxide coating that improves surface durability and helps resist wear in tough machining environments.
• Flute Design: Spiral flute geometry designed for efficient chip evacuation in blind holes, reducing clogging and breakage risk.
• Thread Type: UNC threading capability for standard coarse internal threads with consistent engagement.
• Application: Optimized for blind-hole tapping, providing reliable core-to-wall engagement and clean thread profiles.
• Size: No. 5 x 40, denoting the nominal size and 40 threads per inch for precise, repeatable threads.

Whether repairing a critical fastener or creating a new component, this tap delivers clean, accurate threads with extended tool life. The combination of HSS‑E cobalt and steam oxide coating supports higher cutting speeds and tougher materials, while the spiral flute minimizes chip buildup for smoother operation and fewer insertions. Rely on this tap for dependable performance in demanding blind-hole applications, delivering consistent results across multiple jobs and reducing downtime due to tool wear or breakage.