The Carmex 1/4 x 20 MT3 Solid Carbide Fast Thread Mill is a high‑precision internal threading tool designed to reliably cut UNC/UNF/UNEFS/UNS threads in hard materials. Built for machinists and manufacturers working with demanding alloys, it delivers consistent thread quality and long tool life in tough environments.

• Thread format compatibility: Internal threads in UN family profiles (UNC, UNF, UNEF, UNS) with a 1/4"-20 pitch.
• Fast Type geometry: Optimized geometry for rapid material removal and efficient chip evacuation during threading.
• High flute count: Up to 7 flutes on select models for improved stability and better performance in hard materials.
• Material and shank: Solid carbide cutting body with MT3 Morse Taper shank for secure, quick mounting on standard toolheads.
• Coating and grade: Ultra‑fine MT3 grade with a PVD multi‑layer coating engineered for high heat and wear resistance.
• Hardness capability: Suitable for machining hard materials up to 65 HRC, including challenging superalloys.

Designed to deliver clean, accurate threads in tough substrates, this thread mill minimizes chatter and deflection while extending tool life through a durable, wear‑resistant coating. Its robust carbide core and multi‑layer coating help maintain sharpness at higher speeds, reducing cycle times without sacrificing thread quality. Ideal for aerospace fasteners, mold components, and powertrain parts where precise internal threads and material resilience are critical.