The OSG BSW Spiral Point Threading Tap is a high-performance tool designed for through-hole tapping of British Standard Whitworth threads. Built for machinists and shops that demand precise, durable internal threads, it balances reliability with long tool life.

• Thread Size: 5/8 x 11 BSW spiral point threading tap optimized for through-hole applications.
• Material: HSS‑E (high-speed steel with cobalt) for enhanced heat resistance and extended cutting life.
• Coating: Steam oxide coating provides lubricity, wear resistance, and corrosion protection in tough cutting conditions.
• Flute/Point Design: Spiral point geometry promotes efficient chip evacuation and smooth penetration in through-holes.
• Application: Specifically engineered for reliable through-hole tapping in a range of machining tasks and maintenance work.
• Brand and Engineering: OSG threading technology delivers consistent, high-precision threads and dependable performance.

With its cobalt-enhanced alloy and protective steam oxide finish, this tap maintains sharpness under heat, delivering clean, accurate threads with fewer reworks. The spiral point design efficiently pushes chips out of the hole, reducing clogging and enabling steady progression through the material. Ideal for production runs and precision repairs alike, it offers lasting tool life and dependable performance in through-hole BSW tapping.