the bottom flat washer next to the nut is a regular washer with a round hole. the two fiber washers act as brakes to hold the window open at speed. you adjust that by tightening the nut


1953 Chevy 3100
261 and SM420
53Chevy 3100
1953 Mack Firetruck
1972 Porsche 911
1986 Honda Goldwing