Wow, are you going to have as much detail in the whole car, as you have in just the bolts alone? If so, that's a really challenging project! I have a lot of respect for challenging projects, lol!
I would only have one comment. In the 3 views of 3 bolts, they go from almost round, to more tightly elliptical, which I think is to show them at different angles. What I'm thinking is that the closer the views go from I'd say a 45 degree angle, to more of a side or profile view, more of the shaft of the bolt would be showing; while in your bolts, the visible part of the shaft is the same length.
That said though, if the goal is to draw the whole vehicle/cartoon character, I don't think it would be noticable, because they're so small compared to the whole car.
I'll be excited to watch this progress
