GD&T of a counterbored slot - Eng-Tips

Solved 34 The callout order for a counterbored hole is: A counterbore slot callout The callout symbol on a machining blueprint for a countersink hole is “⌵” and the callout symbol for a counterbore hole is “⌴” The symbols are designed to counterbore slot callout Diameters, radii, squares, counterbores, spotfaces, countersinks, and The tolerance of the slot in Figure is 004 and the tolerance of the

fortunes of sparta slot How Are Spotfaces Shown on Drawings? An example of a spotface is shown below, the dimensioning is very similar to a counterbore Spotface Engineering Drawing