The Carmex 21-12ABUT Carbide Threading Insert with TiAlN coating is a versatile ABUT insert designed to cover all common thread profiles. Built for professional machinists and shops, it delivers reliable, long-lasting performance across a range of threading tasks.

• TiAlN-coated carbide substrate: enhances hardness and heat resistance for longer tool life and consistent cuts in demanding threading operations.
• ABUT geometry with double-sided edges: two cutting edges maximize usage between regrinds (except for BSPT, NPT, NPTF, American Buttress, and API RD variants).
• Five length options (12–40 mm): provides the right reach for a variety of hole sizes and threading applications.
• Broad thread profile coverage: designed to handle all common thread profiles with a single insert strategy.
• Wide pitch range: capable of threading from 0.5 mm (32 TPI) to 6.0 mm (4 TPI) for flexible production setups.
• Internal & external threading capability: in many profiles, the same insert can machine both internal and external threads (ISO/UN/NPSM/UNJ/Acme exceptions apply).

This combination reduces tool changes, simplifies inventory, and delivers consistent thread quality across jobs. The TiAlN coating helps maintain sharpness and reduce wear at higher speeds, while the ABUT design and multiple cutting edges support efficient, repeatable results. Ideal for professional workshops and production environments where dependable threading performance matters.