Carmex Thread Mills Carbide Mini Type - Metric - M4, M5 x 0.5 - MT7A compact carbide thread mill designed for metric M4 and M5 threads (M4 x 0. 5, M5 x 0. 5) with MT7 shank. Built for high speed threading with reliability, it handles both internal and external threads in a single tool, making it ideal for shops that demand precision and efficiency. Grade and coating: MT7 sub micron carbide with a TiAlN multi layer coating (ISO K10K20) for exceptional wear resistance at high speeds. Threading versatility: Produces