73 duster steering column mounting?
From the factory they have 3 serrated nuts . They must give you the washer style for the ground wire. All the cars I stripped over the years had a serrated nut holding the ground. Usually when you go to take it off the stud comes out with it so you have to take the 5/16 bolt off first so the wire can spin out with the stud and the two nuts.
I have some here with the wire still on the stud between the two nits. Use the nut with the washer for the ground. I don't see what it will hurt. But that is not how they came . 3 serrated nuts is factory on every car I took apart.