ISO Metric Threads (Explained)
Our tool is a metric thread tolerance calculator that is addressed to students, employees, and apprentices (trainees) in all technical sectors. It calculates minor diameter, pitch diameter, major diameter and tap drill size by simply selecting from a list the desired designation and type of thread. The ISO Metric Standard is the most commonly used used. The `M` designation for metric screws indicates the nominal outer diameter of the screw/nut thread, in millimeters.
Supported metric threads range from M0.25 up to M120.