I'll have to measure the nut, do you mean the outside nuts? my forks were (at one time) NOS, and have never taken them apart, here a picture, and the drawing of the washers, but they were only knurled before 1938 or so, and before that they used fiber washers, go figure that out, but it's said they kept the grease in better, and wore out to the right thickness when adjusted too tight real quick.
Cheers,
Lex
STD167 knurled washers.pdf