16EL18UNK20 - Carmex Thread Turning External Insert - UN (UNC,UNF,UNEF,UNS) - Left Hand

The Carmex Thread Turning External Insert – UN (UNC, UNF, UNEF, UNS), Left-Hand, 16EL18UNK20 – is a precision threading insert designed for external left-handed threads. It’s built for machinists, shops, and technicians who regularly work with UNC, UNF, UNEF, and UNS standards. Its main advantage is delivering clean, reliable threads with minimal setups across a wide range of applications.

As part of Carmex’s industry-leading range, this triangular laydown insert combines a robust geometry with quality materials to provide stable cutting, smooth finishes, and repeatable results—even on tougher materials. It’s designed to withstand daily production demands, helping you complete more work in less time with fewer rework cycles.

• Left-Hand UN thread compatibility: Engineered to deliver clean, consistent cuts on UNC, UNF, UNEF, and UNS left-hand threads, reducing adjustments and the need for multiple tools.
• Triangular laydown geometry: The laydown insert geometry provides rigid seating and improved chip control for a smoother, more reliable thread finish across applications.
• Broad compatibility and durability: Versatile enough for a wide range of materials and thread standards, helping you complete more jobs with a single insert while maintaining performance over time.

This Carmex insert helps you streamline your threading workflow: reliable starts, fewer passes, and consistent thread quality across jobs. With durable construction and a geometry designed for stability, it supports faster setup, reduced downtime, and predictable results you can trust in production environments.