The angularity (including parallelism and perpendicularity) tolerance is the
total deviation between two planes within which the entire surface so
toleranced must lie. The planes of deviation (tolerance zone) forms the
basic angle to the datum plane. Tolerances are for draft free surfaces (see
Draft standard). To establish planes see Flatness standard.
PERPENDICULARITY
For one surface formed by a mold section and the other surface by a core set
in the same mold section:
Up to 3 in. length .025
Additional length over 3 in. .0025 in./in.
For one surface formed by a mold section and the other surface by a core
located acoss the parting line, or surfaces formed by two cores in the same
mold section:
Up to 3 in. length .030
Additonal length over 3 in. .003 in./in.