The OSG UNC Spiral Point Threading Tap is a purpose-built through-hole tapping solution for precise 5/16-18 UNC threads. Crafted for shops that demand durability and consistent results, it combines robust material with a protective coating to extend tool life and performance.

• Thread Size: 5/16-18 UNC through-hole threading for standard, widely-used fastener compatibility.
• Material: HSS-E (high-speed steel with cobalt) for enhanced wear resistance and heat tolerance during tapping.
• Coating: Steam oxide coating adds durability and lubricity to reduce wear during extended cuts.
• Design: Spiral Point geometry facilitates efficient chip evacuation, minimizing chip wrap in through-hole operations.
• Application: Optimized specifically for through-hole threading, delivering straight, clean threads from start to finish.

With the combination of HSS-E, steam oxide coating, and spiral-point geometry, this tap maintains sharpness longer, withstands higher cutting temperatures, and reduces downtime caused by chip congestion. The result is reliable, repeatable UNC threads in through-hole workpieces, improved tool life, and a smoother tapping process for production and precision machining tasks.