Engineered for through-hole pipe-threading, the OSG NPT Spiral Point Threading Tap combines cobalt-enhanced HSS-E durability with a steam oxide finish to deliver precise, repeatable 1/2 x 14 NPT threads.

• Material: HSS-E (high-speed steel with cobalt) for increased hardness and wear resistance.
• Coating: Steam oxide coating provides improved heat resistance and lubricity during tapping.
• Design: Spiral point geometry promotes swift chip evacuation, reducing built-up material in through-hole tapping.
• Through-Hole Capability: Optimized for through-hole applications to produce clean, accurate NPT threads.
• Size: 1/2 x 14 NPT threading specification for standard pipe fittings.
• Brand Engineering: Precision-crafted by OSG for consistent performance and long tool life.

This tap is ideal for machinists and shops performing pipe-threading in through-hold metalwork. The combination of HSS-E with cobalt, along with the steam oxide coating, helps achieve reliable thread quality under demanding cutting conditions while offering extended tool life. Its spiral point design specifically addresses chip control, enabling smoother operation and reduced cycle times for through-hole NPT tasks.