The Carmex Spiral Mill Threading Insert – NPT is a versatile, high-performance cutting insert designed for precision NPT threading and broader milling tasks. It’s built for a wide range of shops—from compact machining centers handling small components to heavy-duty production environments—delivering smooth cuts at higher feed rates to reduce overall cycle times.

With MT7 Sub-Micron Grade inserts and a Titanium Nitride multi-layer coating (ISO K10–K20), this tool combines wear resistance with a reliable finish across materials. Its spiral flute geometry and a unique clamping method support efficient indexing and long tool life, making it a dependable choice for threading, end milling roughing, and finishing in diverse applications.

• Smooth, high‑feed threading: Spiral design enables fast cutting and reduced cycle times while maintaining clean, accurate NPT threads.
• Flexible insert capacity with reliable indexing: Toolholders accommodate 1 to 9 inserts in a compact diameter, with a clamping system that ensures optimal indexability and stable operation.
• Durable MT7 Sub‑Micron TiN coating: Sub-micron grade inserts with TiN multilayer coating deliver wear resistance across materials (ISO K10–K20) for consistent performance in threading and milling.

This insert is designed to deliver consistent results across a variety of materials and applications, helping you maintain tight tolerances, reduce downtime, and improve overall workflow. Whether you’re producing small, high-precision parts or tackling demanding milling tasks, it provides dependable performance, smooth finishes, and a clear path to efficient, repeatable results.