OSG Threading Tap - BSPT Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - 1/4 x 19

The OSG BSP Spiral Flute Threading Tap is a precision tool designed for machinists needing accurate BSPT threads in blind holes. Crafted from HSS-E cobalt and finished with a Steam Oxide coating, it delivers durable performance and steady cutting reliability in tight workspaces.

• Thread type: BSPT (British Standard Pipe Taper) threading, 1/4" nominal size with 19 TPI, optimized for blind-hole applications.
• Material: HSS-E (high-speed steel with cobalt) for enhanced hardness, heat resistance, and long tool life during demanding tapping tasks.
• Coating: Steam Oxide finish to improve wear resistance, reduce galling, and promote smoother chip flow under cutting conditions.
• Flute design: Spiral flute geometry that excels at evacuating chips in blind holes, minimizing clogging and reducing the risk of breakage.
• Application focus: Specifically engineered for precise BSPT threading in confined or blind-hole pockets, aiding consistent thread quality and fit.

Benefits: With its robust HSS-E construction and efficient spiral flute geometry, this tap delivers accurate, reusable threads that seal reliably and resist wear over time. The durable coating extends tool life in metal-cutting environments, while the spiral flutes help maintain steady cutting action and cleaner hole finishes in tight locations. For optimal results, pair with proper lubrication and conventional tapping speeds appropriate for the workpiece material and hole depth.