The Carmex Vertical Milling CMT Three Flute Insert - Threading (C258NPTMT7) is a versatile vertical milling insert designed to handle threading, grooves, chamfers and more. It’s built for engineers, machinists, and hobbyists who need reliable, repeatable results in demanding milling tasks with high surface quality. Ground-profile inserts deliver high precision and excellent performance, and a solid clamping method ensures full repeatability. The same insert can be used for right- or left-hand threads, and the toolholders include a Weldon shank and coolant bore. Chamfer inserts are also available.

• Ground-profile inserts for precision and performance: Precise geometry delivers accurate threads, grooves, and chamfers with a smooth finish, even at higher cutting parameters.
• One insert for both right- and left-hand threads: Simplifies procurement and setup, reducing inventory and speeding program changes.
• Toolholders with Weldon shank and coolant bore: Secure, repeatable clamping paired with integrated coolant delivery for consistent results and easier tool changes.

Together, these features empower you to complete threading, grooves, and chamfers with confidence—improving consistency, reducing downtime, and helping you achieve reliable, quality results across a range of milling tasks.