Yes, it is possible to do this. [blue]TheTick[/blue] is correct that the pitch diameter is default. It can be difficult to check GD&T using pitch diameter, so you can specify the minor diameter for internal threads and the major diameter for external threads to simplify things.
For example, let's assume you want the tapped hole threads of a boss to be perpendicular to the boss face. Specify the boss face as datum A. Then, use an arrow pointing to the internal threads, use a text note saying minor diameter, and use GD&T symbols for perpendicularity, the allowable tolerance, and refer to datum A.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.