Diameter Width and Depth Tolerances for Class A Hollow Shapes
all dimesions in millimetres unless specified - tighter tolerances available on request
Note: For a rectangular hollow as shown in the diagram, the tolerances are determined as follows:
(a) The tolerance for the width, A, is the value in Column 3 for a dimension equal to the depth B.
(b) The tolerance for the depth, B, is the value in Column 3 for a dimension equal to the width A.