OSG Threading Tap - BSW Spiral Point HSS-E - Steam Oxide Coated - Through Hole - 5/16 x 18

Elevate your through-hole threading with the OSG BSW Spiral Point Threading Tap. Crafted from high‑speed steel with cobalt (HSS‑E) and finished in a durable Steam Oxide coating, this tap is built for precision, longevity, and reliable performance in demanding metalworking environments.

• Material: HSS‑E (high‑speed steel with cobalt) for superior heat resistance and extended tool life in tough materials.
• Coating: Steam Oxide finish to reduce wear, improve lubricity, and enhance life in through‑hole applications.
• Thread type: BSW spiral point geometry designed to push chips forward for efficient, clean threading.
• Size & pitch: 5/16" diameter with 18 TPI (through-hole tapping standard) for precise, dependable threads.
• Design purpose: Optimized for through‑hole tapping, delivering consistent thread profiles and reducing misalignment during operation.
• Application: Ideal for steel, cast iron, and similar alloys where through‑hole threads are required and reliability matters.
• Manufacturer precision: OSG’s advanced threading technology ensures accurate thread form and extended tool life in critical machining tasks.

This tap helps machinists achieve precise 5/16"-18 through‑hole threads with fewer passes and smoother chip evacuation, reducing downtime and finishing time. The combination of HSS‑E material and the Steam Oxide coating provides a robust tool that stands up to heat and wear, while the spiral point geometry enhances productivity by efficiently guiding chips out of the hole and maintaining stable cutting action. Whether upgrading a shop’s threading toolkit or tackling high‑volume or precision work, this tap delivers dependable performance and consistent results.