Carmex Spiral Mill Threading Insert - NPTF - H23-11.5NPTFMT7 is a spiral-fluted threading tool designed for precision NPTF threads. It suits a wide range of users—from job shop machinists to engineers and hobbyists—offering fast, clean threading with fewer passes.

Built around a compact, indexable insert assembly, it uses MT7-compatible inserts with a Sub-Micron Grade and a Titanium Nitride multi-layer coating (ISO K10–K20), delivering long tool life and dependable performance across many materials.

• Smooth threading at high feed rates: The spiral cutting action enables a smooth cut at higher feed rates, reducing cycle times while maintaining accurate, clean NPTF threads.
• Compact, highly indexable insert assembly: Spiral toolholders hold 1 to 9 inserts in a small cutting diameter, with a unique clamping method that ensures reliable indexability and minimizes downtime during tool changes.
• Durable MT7 TiN-coated inserts: Sub-Micron Grade inserts with a Titanium Nitride multi-layer coating offer extended wear life and broad material compatibility, delivering consistent results across metals.

Whether you’re threading hydraulic fittings, valve components, or custom parts, this Carmex insert helps you achieve reliable, repeatable thread quality with fewer passes and less machine time. The combination of smooth spiral cutting, robust indexing, and durable coatings supports improved workflow, reduced downtime, and steady performance in both light and heavy milling environments.