Projected tolerances are used to make the tolerance more specific.

Projected tolerances are specified in addition to positional tolerances to make the
tolerance more specific. For example, projected tolerances control the perpendicularity
tolerance zone of an embedded part.

The symbol for projected tolerance ( ) is preceded by a height value, which specifies
the minimum projected tolerance zone. The projected tolerance zone height and symbol
appear in a frame below the feature control frame, as shown in the following illustration.

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spSep 2010 … The projected tolerance is a GD&T modifier used for threaded and press fit holes in order to ensure the proper fitments of the mating parts by means of studs or bolts. Let's see the following example: Say, you have a plate with a hole in which a stud will be inserted.projected tolerances control the perpendicularity tolerance zone of an embedded part. The symbol for projected tolerance ( ) is preceded by a …projected tolerance zone. The projected tolerance zone height …Projected Tolerance Zone on GlobalSpec.projected tolerance zone is defined to predict the final dimensions and locations of features on a component or assembly subject to tolerance stack-up.PROJECTED TOLERANCE ZONE. “ When mating parts are to be assembled over tight fitting pins or studs or with parts threaded into a tapped hole, it is possible …projected tolerance zone applies to a feature, such as pin, stud, screw, or similar. GD&T Training Definitions – Engineers Edge.9 Apr 2016Zone.html · rupesh dewangan over 5 years ago. Adam, please see attached file & conform it.