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Notice that the screw embeds itself inside one part of the base. On this side, there is a metal washer and a second washer made out of something that resembles cardboard.
Here is the reassembled screw. I have added two #10 (3/16" approx. interior diameter) washers, each about 3/8" across on the outside. These are placed on the screw first, followed by the original metal washer.