The OSG NPT Spiral Flute Threading Tap is a precision tool built for professionals who need reliable 3/8-18 NPT threads in blind holes. Crafted from HSS-E cobalt and finished with Steam Oxide, it delivers durable, heat-resistant performance for demanding tapping tasks.

• Thread Size and Type: 3/8-18 NPT pipe thread designed for standard NPT connections in blind-hole applications.
• Flute Design: Spiral flute facilitates efficient chip evacuation, helping prevent chip packing in blind holes.
• Material and Coating: HSS-E cobalt steel with a Steam Oxide coating for enhanced wear resistance and lubricity.
• Application: Ideal for tapping NPT threads in blind holes on metal components used in hydraulics, pneumatics, and piping systems.
• Chip Evacuation: Open spiral path directs chips upward and out as threads form, reducing the risk of debris packing the hole.
• Surface Treatment: Steam Oxide finish boosts lubricity and contributes to longer tool life in demanding tapping tasks.

With the OSG NPT Spiral Flute Threading Tap, you can expect precise, clean threads that seal reliably in NPT connections. The HSS-E cobalt base and steam-oxide coating deliver durability and smoother cutting, translating to longer tool life and fewer re-taps in tough metals. The spiral flute’s efficient chip evacuation minimizes slot packing, reducing downtime and ensuring consistent performance across blind-hole threads. This tap is ideally suited for automotive, hydraulic, and industrial piping projects where dependable, leak-tight fittings matter most.