OSG BSPT Spiral Flute Threading Tap is designed for precision blind-hole threading in metalworking, delivering accurate BSPT threads and long tool life. Built for professional machinists, it combines robust HSS-E cobalt material with a durable steam oxide coating for reliable performance in challenging materials.

• Diameter x Thread: 3/8" nominal diameter with 19 TPI BSPT (British Standard Pipe Taper) threading, optimized for blind-hole applications.
• Material: HSS-E (high-speed steel with cobalt) for enhanced hardness and wear resistance under cutting heat.
• Coating: Steam oxide finish provides corrosion resistance and helps with lubricant retention during cutting.
• Flute Design: Spiral flute geometry facilitates efficient chip evacuation in confined blind holes, reducing clogging and breakage.
• Application: Specifically engineered for blind-hole threading in steel and alloy workpieces where access is limited from one end.
• Compatibility: Designed for use with standard tapping setups that support BSPT threads, ensuring smooth integration into existing workflows.
• Precision & Durability: Ground geometry delivers clean, accurate threads while the coating and material choice extend tool life in demanding environments.

This tapping solution helps you achieve consistent, high-quality BSPT threads in blind holes, with reduced downtime thanks to excellent chip evacuation and wear resistance. The combination of HSS-E cobalt and steam oxide coating supports better heat management and longevity, making it a dependable choice for fittings, hydraulic components, and other precision-threaded assemblies.