Engineered for precision BSF threading, the OSG BSF Spiral Point Threading Tap delivers reliable, high-quality through-hole threads for critical assemblies. Built from HSS-E cobalt with a Steam Oxide coating, it’s designed to endure demanding machining tasks and extend tool life.

• Thread Form: BSF Spiral Point geometry designed for through-hole tapping and efficient chip evacuation.
• Material & Coating: HSS-E (high-speed steel with cobalt) with Steam Oxide coating for improved wear resistance and heat tolerance.
• Size & Pitch: 9/16 in diameter with 16 TPI (BSF) suitable for through-hole threads.
• Through-Hole Design: Optimized for through-hole applications, promoting straight, accurate BSF threads.
• Chip Evacuation: Spiral point helps push chips ahead of the tool, reducing clogging and improving tapping speed.
• Durability & Life: Steam Oxide coating lowers friction and wear, extending tool life in tough machining tasks.

OSG's advanced threading technology ensures consistent, precise BSF threads with each use, supporting reliable assemblies in fittings and fixtures. The combination of cobalt-enhanced HSS, heat-resistant coating, and spiral point geometry translates to longer tool life, fewer tool changes, and smoother finishing. For shops that demand accuracy and efficiency, this tap provides a dependable solution for through-hole BSF threading tasks.