Surely for a car you'll want specific nuts and bolts. That is specific certified grades not just any old metric bolt. That faborymetrican site certainly has bolts to all the various grades and specifications.
Very correct.
So many bolts and screws for cars are very specific, be it overall length, amount of thread, head size, grade, etc. Some are normal off the shelf, but in a lot of cases about all you can do is get the exact one you need, either from a parts car, or from the dealer.
Sometimes you have to get a longer one than you need and cut it to get the right amount of shoulder for the appication.
