1954 Truck

Stephen Mulkey said

I looked at the fender this morning and there's two sets of threaded holes. One set is 5/16 - 24 national fine and the others are 7/16 - 20 national fine.
I also remember the hood division strip mount up by the firewall is a national fine also.

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I don't know what you have for stores where you live but Ag stores here sell hardware by the pound. I would use grade 5 unless you don't like the color. (usually blue) Those fasteners will work fine if you are not restoring the truck. A few different sizes, different lengths, and some flat washers and lock washers to match.