Engineered for precision UNC threading in through-hole applications, the OSG UNC A-Spiral Point Tap delivers reliable, high-quality threads with efficient chip evacuation. Built for machinists, job shops, and production environments, it combines a spiral-point geometry with a rugged powder-metal body and TiCN coating to perform under demanding cutting conditions.

• UNC A-Spiral Point geometry: Enables fast, clean starts and efficient chip evacuation in through-holes, reducing pushing and snagging.
• Powder Metal construction: Durable, wear-resistant body designed for long tool life in tough materials.
• TiCN coating: Higher heat resistance and reduced wear, supporting higher speeds and extended cutting life.
• Right-Hand threading: Standard orientation for common UNC configurations, delivering predictable results.
• Through-Hole compatibility (DIN2184-1): Precisely engineered to meet DIN2184-1 specifications for reliable through-hole taps.
• Size: 7/8 in diameter with 9 threads per inch (7/8 x 9), ideal for common UNC through-hole sizes.
• Material versatility: Suitable for a variety of metals, delivering high-speed cutting and a smooth, accurate finish.

This tap enables faster cycle times and consistent thread quality in everyday machining tasks—whether you’re setting up a production run or performing precise repairs. The combination of spiral-point geometry, powder-metal durability, and TiCN heat resistance helps you achieve reliable UNC threads with fewer reworks, lower tooling costs, and longer intervals between tool changes.