External Metric ISO Thread Table Chart Sizes M20 M55
The following are metric external thread size table chart for sizes M20 to M55 per ANSI ASME B1 13M 1995 These thread sizes and classes represent bolts and screws as well as other standard external threads Do not use these values for standard metric internal thread designs All units in mm ISO Metric Thread Designation Pitch External Threads Tolerance Class Major Dia