Countersink this hole enough to allow the head to sink flush with the surface.
Bore all holes, where shown in the drawing, and countersink them.
Countersink the holes on the side from which the screws enter.
Countersink all holes, except the four holes which hold the supports for the cart handle.
Countersink the hole in the base on the under side with a 1/2-in.
By using round-head screws it was unnecessary to countersink the metal.
Be sure to countersink the holes for the heads of the bolts.
The term is also applied to the tool with which the countersink is formed.
Bore and countersink four holes for 11⁄4-inch flat-head screws.
The Countersink, which is a drill made to fit in the bit-stock, and bores a hole the shape and depth of the screw-head.