GD&T of a counterbored slot - Eng-Tips

Creo: Counterbore and Countersink Tutorial counterbore slot callout A spotface symbol is similar to the counterbore symbol, with the addition of the letters “SF The spotface callout indicates a spotface counterbore slot A counterbore is a circular hole with a flat bottom which coincides with another hole The counterbored section allows a bolt head or other

pragmatic 138 slot or if not, what is a better way to make the callout? Should I lay a center mark on the curved slot center, give it a radius dimension,