Slot centerlines, center marks, and callouts

counterbore slot callout   Dan counterbore slot

Counterbore dimensioning refers to specifying the size and tolerances of a counterbore hole Slot multiple metals, Spade Drill

Counterbored holes are specified by giving the diameter of the drill, the diameter of the counterbore, and the depth of the counterbore  Use this chart to find out what size counterbore hole to use for your ANSI Inch socket cap head screws and bolts

shadow of the panther power bet slot This article highlights the differences between spotface holes and counterbore holes These holes are compared in terms of shape, depth, callout Counterbored Holes Dimensions METRIC SOCKET-HEAD CAP SCREWS SCREW DIA COUNTERBORE DIA COUNTERBORE DEPTH COUNTERSINK DIA CLEARANCE DIA