The Carmex Carbide Threading Insert for UNJ threads is a durable, TiAlN-coated solution built for machinists who regularly cut UN and UNJ thread profiles. Designed to deliver reliable performance across a wide range of pitches and thread types, it’s a practical choice for precise threading in metalworking environments.

• Five length options (12–40 mm): a versatile family of inserts that spans typical thread profiles, enabling broad coverage without swapping tooling.
• Wide pitch range: handles pitches from 0.5 mm / 32 TPI up to 6.0 mm / 4 TPI, with compatibility depending on the chosen length.
• TiAlN-coated carbide: enhanced wear resistance and heat tolerance for longer insert life and steadier cutting performance in demanding operations.
• Double-edged design: each insert provides two cutting edges for extended use, reducing tool changes (exceptions apply for BSPT/NPT/NPTF/American Buttress/API RD).
• Internal/External threading versatility: for many thread profiles, the same insert can machine both internal and external threads; note that some profiles (ISO / UN / NPSM / UNJ / Acme) have specialized requirements.

Designed to simplify threading workflows, this insert offers consistent chip control and clean thread finishes across a variety of applications—from plumbing fittings to precision fasteners. Its robust construction and edge geometry help maintain accuracy over multiple passes, making it a reliable choice for medium- to high-demand threading tasks in workshops and production environments.