Meet the OSG BSPT Spiral Flute Threading Tap—a precision tool designed for machinists and fabrication shops that need accurate BSPT (British Standard Pipe Taper) internal threads in blind holes. Crafted from HSS‑E (high‑speed steel with cobalt) and finished with a durable steam oxide coating, it combines longevity with reliable performance in demanding threading tasks.

• Size and thread type: 1/2" diameter, 14 TPI BSPT (British Standard Pipe Taper) internal thread for blind holes
• Material: HSS‑E (high‑speed steel with cobalt) for improved hardness and wear resistance
• Coating: Steam oxide coating enhances durability and heat resistance during cutting
• Flute design: Spiral flute facilitates efficient chip evacuation in restricted-depth, blind-hole applications
• Application: Optimized for clean, accurate BSPT threads in blind holes, reducing rework and thread defects
• Brand: OSG, a trusted name in precision threading tooling

This tap delivers consistent, high‑quality threads with extended tool life, even under the heat and friction of deep or challenging blind-hole cuts. The spiral flute design helps chips exit smoothly, minimizing clogging and improving cycle times. With its cobalt-enriched HSS and steam oxide finish, you can rely on steady performance and repeatable results across critical machining tasks that require BSPT threads.