Perpendicularity
Specifying Perpendicularity (Hole)
Specifying Perpendicularity (Pin)

This on the drawing:

Means this:

Where the thread profile is at MMC, the feature axis must lie within a cylindrical zone 0.3 diameter which is perpendicular to and projects from datum plane A for the 14 specified height. The feature axis must be within the specified tolerance of location over the projected height.

Note: A threaded hole is located and gaged from its thread profile at MMC. Consideration must be given to the additive tolerance which results from the departure from MMC. The centering effect of the fastener at assembly, however, may reduce or negate such added tolerance.


SPECIFYING PERPENDICULARITY FOR AN AXIS AT A PROJECTED HEIGHT (THREADED HOLE OR INSERT AT MMC)