GD&T Glossary

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Actual Local Size

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Terms in this set (248)

Actual Local Size

The measured value of any individual distance at any cross section of a feature of size.

Actual Mating Envelope

This envelope is outside the material. A similar perfect feature(s) counterpart of smallest size that can be contracted about an external feature(s) or largest size that can be expanded within an internal feature(s) so that it coincides with the surface(s) at the highest points. There are two types of actual mating envelopes: related and unrelated.

Actual Minimum Material Envelope

This envelope is within the material. A similar perfect feature(s) counterpart of largest size that can be expanded within an external feature(s) or smallest size that can be contracted about an internal feature(s) so that it coincides with the surface(s) at the lowest points. There are two types of actual mating envelopes: unrelated and related.

All-Around Symbol

The symbolic means of indicating that a tolerance applies to surfaces all around the part is a circle located at the junction of a leader from the feature control frame.

Angularity

The condition of a surface, feature's center plane, or feature's axis at any specified angle from a datum plane or datum axis.