OSG Threading Tap - UNC Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - No. 5 x 40

The OSG UNC Spiral Flute Threading Tap is a precision tool designed for machinists who need clean, accurate internal threads in blind holes. Built for durability and reliable performance, this No. 5 x 40 UNC tap delivers consistent results and extended tool life in demanding metalworking tasks.

• Threading format: UNC spiral flute design optimizes chip evacuation in blind holes, reducing cutting resistance and the risk of built-up edge.
• Material: HSS-E (high-speed steel with cobalt) for superior hardness and wear resistance under high heat.
• Coating: Steam Oxide coating provides improved heat resistance and corrosion protection, helping the tool last longer in tough materials.
• Size/Thread: No. 5 x 40 UNC thread size for common internal-thread requirements.
• Application: Specifically engineered for blind-hole threading where chip control is critical.
• Precision: Ground flute geometry supports accurate thread form and consistent performance across uses.

With the OSG UNC Spiral Flute Threading Tap, you’ll achieve accurate, repeatable threads with minimal fuss. The spiral flute aids chip evacuation, which is especially important in blind holes, helping prevent binding and tool breakage. The HSS-E cobalt composition stands up to higher cutting temperatures, while the Steam Oxide coating extends life and reduces corrosion. This combination translates to fewer tool changes, cleaner thread profiles, and reliable results on demanding projects that require precise internal threads.