The OSG UNC Spiral Flute Threading Tap No. 12 x 24 is a precision internal threading tool designed for blind hole work. Built for machinists and production shops, it delivers durable, accurate UNC threads with long tool life.

• Material: HSS‑E (high‑speed steel with cobalt) for enhanced hardness and heat resistance.
• Coating: Steam oxide coating to reduce friction and extend service life in demanding cuts.
• Flute design: Spiral flute optimized for efficient chip evacuation in blind holes, minimizing clogging and improving finish.
• Thread type: UNC (Unified National Coarse) threading for versatile, standard internal threads.
• Size: No. 12 x 24 (nominal diameter No. 12, overall length 24) suited for common blind-hole applications.
• Application: Ideal for producing clean, accurate internal threads in blind holes across a range of metals and production tasks.

Equipped with cobalt-enhanced HSS and a steam oxide finish, this tap sustains cutting performance under heat, delivering precise threads that meet tighter tolerances. The spiral flute design improves chip clearance in deep or narrow blind holes, reducing the risk of built‑up material and rework. For shops prioritizing reliability and consistent results, this OSG tap offers dependable threading with longer tool life and smoother operation.