Carmex Carbide Threading Insert – Unified, TiAlN-coated tooling designed to cover the most common thread profiles in a single, versatile solution. The 40I4UN edition is ideal for machinists and shops that value fast setups, consistent results, and reduced tooling inventory.

• TiAlN-coated carbide substrate: Hardened, wear-resistant coating that helps sustain sharpness and extend insert life at typical threading speeds.
• Five lengths (12–40 mm): A range that fits numerous toolholders and depth requirements, enabling flexible approach angles and cut depths.
• Broad pitch coverage: Capable of threading from 0.5 mm (32 TPI) to 6.0 mm (4 TPI), spanning metric and imperial standards.
• Double‑sided cutting edges: Two usable edges per insert (except for BSPT/NPT/NPTF/American Buttress/API RD), maximizing value per edge.
• Internal & external threading compatibility: For many profiles, the same insert can machine both internal and external threads, reducing tool changes (note exceptions: ISO/UN/NPSM/UNJ/Acme).
• Comprehensive profile coverage: Designed to tackle a wide range of unified thread forms with a single insert family.

This threading insert set is built to streamline your operation. By combining multiple lengths and a broad pitch range in one system, you can handle diverse jobs—from fine imperial threads to coarse metric pitches—without swapping tools. The double-edged design delivers more usable cutting life per insert, while the TiAlN coating preserves edge retention at higher speeds, enabling quicker cycle times and cleaner finishes. For many profiles, you’ll be able to thread internal and external features with the same insert, simplifying inventory and setup while maintaining consistent thread quality.