Tolerancing - General Questions

This practice considers an individual part's dimensions and tolerances and that part's relation to its related parts:

Acceptable parts must not extend beyond this:

This is the theoretically exact size from which limits of size are determined:

This means that a feature of a finished product contains the maximum amount of material permitted by the toleranced dimensions for that feature:

This is the measured size of a finished part:

This is the term for the range of tightness or looseness resulting from the allowances and tolerances in mating parts:

When lines intersect on a drawing at angles of this many degrees, it is customary not to dimension the angle: