There are a number of NF bolts used, but mainly on stuff attached to the frame (steering gear, Master cylinder mount, etc.), but you're correct, sheet metal attachment bolts are all coarse thread.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.