OSG Threading Tap - UNF Spiral Point HSS-E - Steam Oxide Coated - Through Hole - 1/4 x 28

Meet the OSG UNF Spiral Point Threading Tap—designed for through-hole threading with precision and reliability. Built for machinists who demand consistent performance, this tap delivers clean, accurate threads in demanding materials.

• Thread type: UNF Spiral Point tapping for efficient through-hole threading
• Size: 1/4-28 UNF, optimized for standard through-hole applications
• Material: HSS-E (high-speed steel with cobalt) for enhanced strength and heat resistance
• Coating: Steam Oxide coating to extend tool life and reduce wear in challenging cuts
• Point design: Spiral point geometry facilitates fast chip evacuation and smooth entry
• Application: Ideal for through-hole tapping where reliable thread quality and long tool life are critical
• Brand technology: Powered by OSG’s advanced threading technology for precise, repeatable results

With a cobalt-enhanced core and a robust steam-oxide finish, this tap stands up to higher cutting temperatures and repeated use, delivering consistent threads and longer tool life. The spiral point design pushes chips ahead, reducing built-up material in the flutes and minimizing cutting resistance—so you can maintain steady feeds and finish with confidence. Whether you're manufacturing components with through-holes or performing maintenance on critical assemblies, this tap provides dependable performance and a clear path to high-quality results.