Re: Clamping Plates - 8 x 6.5 Wheels
73-87(up to 1991 old style) used a 9/16-18 stud. I dont remember the previous cutoff, as they used a 1/2 inch stud, but I think that was up to 1972 only.
a flanged nut will work, the best design uses a captured washer, so the washer can spin
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