Fastener hole reference plate

A small plate that shows every standard hole for one metric screw size, side by side: two clearance fits, a counterbore for a socket-head cap screw, a countersink for a flat head, a pilot for a self-tapping screw into plastic, and a heat-set insert pocket with its lead-in chamfer and screw-tip relief. Pick the screw size and every hole re-cuts, with each diameter and depth shown in the panel. Print it as a fit coupon to check your printer, or open it to look the numbers up. Prints flat with no supports.