Thread mills are uniquely designed tools intended to produce internal and external thread profiles on a workpiece. Unlike traditional taps and dies which are pushed or rotated into a pre-drilled hole, thread mills utilize a CNC machine’s ability to move in three dimensions, allowing for the precise creation of thread patterns. They are often cylindrical in shape, featuring cutting edges along their sides and sometimes at the tip, allowing them to cut threads for both blind and through holes. The key advantage of using thread mills is their flexibility. A single tool can produce different thread sizes by merely adjusting the CNC programming, reducing tool inventory and offering cost-efficiency. Moreover, because they cut threads using a milling process, thread mills reduce the risk of tool breakage, especially in harder materials, offering longer tool life and reduced downtime.