Carmex Carbide Threading Insert - UNJ - TiAlN Coated - 21I12UNJ

The Carmex Carbide Threading Insert, UNJ, TiAlN coated, is a durable, versatile solution for precision threading across common profiles. Designed for machinists and production environments, it delivers reliable performance and extended tool life in both internal and external threading tasks.

• TiAlN-coated carbide construction: Enhances hardness and heat resistance, helping the insert maintain sharpness and extend life in demanding threading operations.
• UNJ threading optimization: Geometry engineered to support UNJ thread forms, delivering accurate cuts and clean thread finish.
• Five length options: Available in 12 mm, 16 mm, 25 mm, 32 mm, and 40 mm lengths to match a wide range of pitches and machine setups.
• Wide pitch range: Supports pitches from 0.5 mm / 32 TPI up to 6.0 mm / 4 TPI, depending on the chosen length.
• Double-sided cutting edges: Each insert has two cutting edges for extended life and efficient edge utilization (except 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 certain profiles (ISO / UN / NPSM / UNJ / Acme) have profile-specific usage considerations.

This insert combines robust carbide with a TiAlN coating to deliver dependable performance across a spectrum of threading tasks. With multiple lengths and a broad pitch range, it adapts to various tools and setups, helping shops reduce inventory while maintaining consistent thread quality. The dual-edge design minimizes downtime by letting you quickly index to a fresh edge, supporting efficient production workflows and precise, repeatable results.