The Carmex Spiral Mill Threading Insert for NPS threads (H17-14NPSMT7) is a precision cutting solution designed to streamline thread milling and related milling tasks. It’s built for a wide range of users—from engineers and shop floor buyers to tradespeople and hobbyists—delivering reliable performance in both small-part work and heavy-duty milling.

Thanks to its spiral flute design, this insert enables smooth cutting at high feed rates, helping you reduce machining time without sacrificing finish quality. It performs consistently across threading, end milling, roughing, and finishing operations, and its vibration-damping characteristics translate to steadier cuts and less downtime for tool changes or rework.

• Smooth, high‑feed milling with spiral geometry: Delivers efficient material removal with a clean finish and reduced cycle times, while minimizing vibration and chatter for dependable results.
• Versatile insert capacity with precise indexing: Spiral fluted toolholders hold 1 to 9 inserts in a compact cutting diameter, and the unique clamping method ensures optimal indexability for repeatable, reliable threading and milling.
• Durable MT7 TiN-coated inserts for broad material compatibility: MT7 Sub-Micron Grade with Titanium Nitride multi-layer coating (ISO K10-K20) provides wear resistance and consistent finishes across a wide range of materials and applications.

This general-purpose solution is designed to be reliable across diverse machining scenarios, from delicate small-part operations to demanding high-power milling. By combining a robust clamping system, a compact insert layout, and a proven TiN-coated MT7 grade, it helps you achieve precise threads and high-quality finishes with fewer tool changes and less downtime.