Carmex Thread Mills Solid Carbide - External - UNJ is a precision threading tool designed for external UNJ thread forms. Built from solid carbide, it delivers consistent, high-quality threads with excellent surface finish across aerospace, automotive, and precision-machined components.

• Diameter: 12 mm
• Length of cut: 16 mm
• Shank / holder: MT7
• Material: Solid carbide for exceptional rigidity, wear resistance, and long life in demanding materials
• Flute configuration: Spiral flutes with 3–5 cutting edges for efficient chip evacuation and smooth cutting action
• Thread form compatibility: External UNJ family (UNJ, UNJC, UNJF, UNJEF, UNJS) supported for standard UNJ profiles

This external thread mill integrates a spiral flute design with a multi-flute configuration to minimize machining time while delivering an impeccable surface finish on each thread. The tool’s geometry distributes cutting forces across multiple flutes, reducing deflection and maintaining precise thread dimensions even during high-speed operations. Ideal for high-tidelity thread milling on metals ranging from aluminum to hardened steels, it pairs well with appropriate coolant and optimized feeds to maximize tool life and product quality.