Thus, you don’t need to buy a separate washer to place under the screw to distribute the screw’s fastening force against the metal­–the built-in washer does that for you. A sheetmetal screw ...

this metric screw generator will do the trick for screws between M2 and M16 with matching nuts and washers. Fastener hardware is pretty accessible, but one never knows when a 3D printed piece will ...