The Carmex Carbide Threading Insert - Unified - TiAlN Coated - 21E14UN is a durable, all-in-one threading solution built for shops that regularly cut both metric and imperial threads. Designed for versatility and dependable performance, it delivers precise thread formation across common profiles with minimal tool changes.

• Five Length Variants: Available in five lengths from 12 mm to 40 mm to fit a wide range of hole depths and workpiece sizes.
• Extensive Thread Profile Coverage: A versatile collection that covers all common thread profiles, reducing the need for multiple inserts.
• TiAlN Coating: TiAlN-coated carbide for improved hardness, wear resistance, and longer tool life in demanding materials.
• Double-Sided Cutting Edges: Each insert has two cutting edges (except BSPT/NPT/NPTF/American Buttress/API RD) for extended use between indexings.
• Internal/External Capability: For many thread profiles, the same insert can machine both internal and external threads, increasing setup flexibility (ISO/UN/NPSM/UNJ/Acme have exceptions).
• Pitch Range: Supports pitches from 0.5 mm (32 TPI) up to 6.0 mm (4 TPI), depending on the insert length.

Why it matters: You get a single, ready-to-use insert that covers a broad spectrum of threading tasks—reducing downtime, inventory complexity, and tool changes. The TiAlN coating helps maintain sharpness under heat, producing consistent thread forms and smoother finishes. The double-edged design provides extra life, and the ability to machine both internal and external threads for many profiles streamlines setups on CNC and manual lathes alike. Whether you're producing fine-pitched fasteners or robust coarse threads, 21E14UN delivers reliable performance and operational flexibility.