OSG BSP Spiral Flute Threading Tap is a precision internal-threading tool designed for professionals who need reliable BSP threads in blind holes. Crafted from cobalt-enhanced HSS-E and finished with a durable Steam Oxide coating, it’s built to withstand demanding machining tasks while delivering consistent, high-quality results.

• Thread size: 1/8 in diameter x 28 TPI BSP threading for internal threads in blind holes
• Material: HSS-E (high-speed steel with cobalt) for exceptional wear resistance and heat tolerance
• Coating: Steam Oxide coating to reduce friction, extend tool life, and enhance corrosion resistance
• Flute design: Spiral flutes promote efficient chip evacuation in confined blind-hole environments
• Application: Specifically optimized for BSP (British Standard Pipe) thread creation in blind holes
• Durability: Engineered for long tool life under repetitive tapping and tougher materials

This tap addresses common tapping challenges: it maintains precise thread engagement, minimizes chip packing in restricted spaces, and resists wear during extended use. The cobalt-infused HSS-E edge stays sharp under heat, helping you achieve clean, accurate BSP threads with fewer passes. The combination of spiral flutes and the steam oxide finish provides smoother cutting action and reliable performance in metalworking, plumbing fittings, and repair work where BSP connections are standard.