Help with west coast mirror hardware

[Love 70 Chevys]

Took mine apart. All four joints were the same. My truck is very unmolested so this is likely factory correct. First pic is assembled. Second is apart. The two outside washers are flat steel 3/32 thick. The two inner washers are flat plastic 1/16 thick. Probably acetal or UHMWPE. You tighten up the nut until you get enough drag to keep it solidly in place, but not so much that you can't adjust with a little leverage on top of the mirror. I played with them and all still work like a charm. There is about a 1/8 turn of the nut where you go from too loose to too tight, but within that 1/8 turn you can feel where you want to be. I am going to get all the grody paint off the parts and reuse. Hopefully this helps with your mirror project! Has inspired me to get working on mine. A nice little winter take down into the warm basement and make things look pretty again project.