GD&T of a counterbored slot - Eng-Tips

Counterbore Options 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 Block 1 Start with a block primative Then add the counterbore hole; Next add a boss with a draft angle to create the

rare afx slot cars A spotface symbol is similar to the counterbore symbol, with the addition of the letters “SF The spotface callout indicates a spotface