Carmex Carbide Threading Insert - Unified - TiAlN Coated - 21I8UN

Carmex Unified TiAlN-coated carbide threading inserts deliver versatile, reliable threading performance across a wide range of profiles. Built for machinists and shop floors that demand flexibility, consistency, and fewer tool changes, this set handles both internal and external threads where applicable.

• Five length options: available from 12 mm to 40 mm, giving you the reach needed for different pitches and hole sizes.
• TiAlN-coated carbide: robust wear resistance and elevated heat tolerance to extend insert life in demanding materials and cutting conditions.
• Double-edged design: each insert provides two cutting edges for extended usage, with exceptions for BSPT/NPT/NPTF/American Buttress/API RD profiles.
• Internal & external capability: for many thread profiles, the same insert can machine both internal and external threads, simplifying setup (note: certain standards may require dedicated inserts).
• Broad pitch range: supports pitches from 0.5 mm (32 TPI) up to 6.0 mm (4 TPI) depending on the chosen length, enabling versatility across common applications.
• Model designation: part of the Carmex Unified threading insert family (21I8UN) for consistent performance and predictable results.

This threading insert family reduces downtime and inventory needs by covering a wide array of thread profiles with a single, cohesive system. The combination of a TiAlN coating and carbide substrate delivers durable cutting edges that maintain geometry for clean starts and tight tolerances. The dual-edge design makes edge rotation simple, maximizing tool life between replacements. Ideal for shops that machine a variety of threads, this set provides practical flexibility without sacrificing precision or reliability.