The OSG BSF Spiral Point Threading Tap is a precision tool designed for through-hole BSF threading, built for professional machinists and job shops that demand dependable performance and long tool life. Crafted from HSS-E with a steam oxide coating, it delivers superior heat resistance and consistent thread quality across your tapping tasks.

• Thread geometry: BSF Spiral Point (gun-point) design that actively pushes chips forward for efficient, through-hole tapping.
• Material: HSS‑E (high-speed steel with cobalt) for enhanced hardness and heat resistance during demanding cuts.
• Coating: Steam oxide coating reduces wear and provides additional corrosion protection for longer tool life.
• Size: 11/16" diameter with 14 TPI, specifically configured for BSF through-hole threads.
• Through-hole suitability: Optimized for through-hole applications to deliver clean starts and steady thread formation.
• Thread standard: BSF (British Standard Fine) threading to ensure compatibility with BSF fasteners and components.
• Brand and precision: From OSG, a trusted name in high-precision threading taps designed for consistent performance in metalworking.

Designed for through-hole projects where precise BSF threads are essential, this tap supports reliable production runs and high-quality finishes. The spiral point geometry accelerates chip evacuation, minimizing clogging and improving cycle times, while the HSS‑E composition and steam oxide coating resist wear under heat and friction. This combination helps maintain tight tolerances, reduces rework, and extends tool life in everyday threading tasks—from enclosures and brackets to machinery components that rely on robust, accurately shaped BSF threads.