This is, in general, the same for both components.; Lower deviation: The difference between the minimum possible component size and the basic size.; Upper deviation: The difference between the maximum possible component size and the basic size.; Fundamental deviation: The minimum difference in size between a component and the basic size.

This is identical to the upper deviation for shafts and the lower deviation for holes. If the fundamental deviation is greater than zero, the bolt will always be smaller than the basic size and the hole