Engineered for precision blind-hole threading, the OSG Threading Tap delivers reliable NPT spiraled-flute performance you can trust in demanding metalworking tasks. Built with HSS‑E cobalt and a durable Steam Oxide finish, this tap is designed to withstand heat and wear for long tool life.

• Type: NPT Spiral Flute Threading Tap for blind holes
• Material: HSS‑E (high-speed steel with cobalt) for improved heat resistance and durability
• Coating: Steam Oxide coating to enhance wear resistance and extend life
• Size: 1 x 11.5
• Chip Evacuation: Spiral flute design optimizes chip removal in confined blind-hole applications
• Precision: OSG’s advanced threading technology delivers accurate, consistent threads

This tap supports clean, tight NPT threads in hard materials, reducing rework and downtime. The combination of cobalt-enhanced steel and the steam oxide coating provides strong performance under heat, while the spiral flute minimizes chip packing, helping maintain smooth cutting action across multiple passes. Ideal for critical machining tasks in plumbing, hydraulics, and precision assemblies where dependable thread quality matters.