Materials required:
Pliers
Screwdriver
X2 Hex Nuts
X1 Machine Screw
Fender washer
Washer
Start by inserting a machine screw through the hole in the fender washer, and secure it in place using one of the hex nuts.
Using the pliers, grasp the hex nut and hold firmly.
Using the thumb of the same hand, position the fender washer so it is centered on the screw, and hold in place.
Tighten the machine screw using the screwdriver.
Then add the second hex nut.
Next, place a large washer flat on the table, and put a few drops of CA glue around the washer between the hole and the edge.
By using the eyeball method, carefully center and place the fender washer with the screw and hex nuts on top of the washer. You only have one chance, so make sure the fender washer is centered.
That's the finished base: