The OSG BSF Spiral Flute Threading Tap in 9/16 x 16 is a precision tool built for machinists who need robust, accurate BSF threads in blind holes. Crafted from HSS-E cobalt and finished with a steam oxide coating, it delivers standout durability and heat resistance for demanding threading tasks.

• Size and Thread: 9/16" diameter, 16 TPI BSF (British Standard Fine) threading, optimized for blind-hole work
• Material: HSS‑E (high-speed steel with cobalt) for increased hardness and wear resistance
• Coating: Steam oxide coating reduces wear and provides corrosion resistance, helping extend tool life
• Flute Design: Spiral flute geometry facilitates efficient chip evacuation and controlled cutting action in confined holes
• Application: Specifically engineered for blind-hole threading, minimizing chip buildup and improving thread quality
• Performance: Excellent heat resistance and stability under heavy cutting, enabling consistent, high-quality threads

Rely on OSG’s advanced threading technology to deliver high-quality, accurate threads and extended tool life. This tap maintains sharpness through repeated use, supports deeper and cleaner threads in challenging materials, and reduces downtime in production or repair tasks. Whether you’re working on steel, cast iron, or other common base metals, this BSF spiral flute tapping tool provides reliable performance and repeatable results across your critical threading projects.