If a drawing references , and you have a flat surface with a nominal length of 100mm:
Below are representative permissible deviations (in mm) for the and fine (f) classes: Linear Dimensions (ISO 2768-1) General Tolerances to DIN ISO 2768 Iso 2768 General Tolerances Pdf
A bent bracket with a hole pattern. Drawing: Overall length = 150mm, Threaded hole positions = non-critical. Title block: ISO 2768-c (Coarse). Result: If a drawing references , and you have