OSG Threading Tap - NPT Spiral Flute HSS-E - Steam Oxide Coated - Blind Hole - 1/2 x 14

The OSG 1/2 x 14 NPT Spiral Flute Threading Tap is a precision internal threading tool designed for blind-hole work in metal and other machinable materials. Built with HSS-E cobalt and finished with a durable steam oxide coating, it delivers consistent, accurate threads and extended tool life for demanding piping, hydraulic, and mechanical assemblies.

• Size & Thread: 1/2" diameter, 14 threads per inch (NPT) for precise internal threading in blind holes.
• Material: HSS-E cobalt high-speed steel for enhanced hardness and heat resistance during tapping.
• Coating: Steam oxide coating provides improved wear and corrosion resistance, reducing wear over time.
• Flute Design: Spiral-flute geometry promotes efficient chip evacuation, minimizing clogging in blind-hole applications.
• Application: Ideal for creating reliable internal NPT threads in metal parts, pipes, and hydraulic components.
• Durability & Precision: Engineered for consistent thread quality and longer tool life under typical tapping conditions.

With its combination of cobalt-enhanced steel, protective coating, and chip-evacuating spiral flutes, this tap supports clean, accurate threads in challenging blind-hole work. It’s well-suited for plumbing fittings, hydraulic assemblies, automotive repairs, and other precision tapping tasks where dependable internal threads are essential.