Carmex Thread Turning External Insert is a precision cutting insert designed for external thread turning on standard unified thread forms (UNC, UNF, UNEF, UNS). It delivers reliable, repeatable thread profiles across a broad range of materials, making it suitable for engineers, machinists, and technicians. Part number 11ER40UNBMA.

From Carmex's industry-leading range of thread turning inserts, this right-hand, laydown triangular insert is built to handle applications from basic threading tasks to demanding production runs, with consistent results and fewer tool changes.

• Universal UN Thread Coverage: Supports UNC, UNF, UNEF, and UNS external threads in a single insert, reducing tool changes and simplifying inventory while delivering consistent thread quality.
• Durable Triangular Laydown Geometry: The laydown triangular design provides multiple sharp edges and stable engagement for clean thread forms, improved finish, and longer edge life across a variety of materials.
• Right-Hand Configuration for Consistent Results: Optimized for right-hand threads, ensuring predictable cutting direction and reliable performance in everyday turning operations.

This insert is designed to streamline threading work, delivering dependable performance from prototype runs to high-volume production. With its durable geometry and broad compatibility, you can expect faster setup, fewer insert changes, and consistently accurate UNC/UNF/UNEF/UNS threads—backed by Carmex’s proven tooling reliability.