top row looks like door hinge bolts ? 3/8" thread , 9/16" hex ?

2nd row down left to right 1/4-20 could be header to fender or valance to fender bolts ,,,,next 1/4-20 sems screw has 3/8" hex head with fixed washer head exhaust muffler heat shield ,, same as rear axle to frame rail bumper , the 2 on far right - front bumper bracket to frame rail bolts ?


3rd row down - left to right - the single one ,,,maybe same as above it , the pair on far right, No idea
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4th row down , stud with the nut and captive washer is lower fender to rocker panel stud