screws for armrests and hood springs

I need hardware to put my armrests on my '70 Dart. I assume that they are screws as i tried a bolt and it did not work. Does anyone know if i need to order something specific or can i find the right size at a hardware store?

Also, my dart did not come with any hood springs. I bought a pair off of ebay that came off a 68 Barracuda. I assume that they will fit since they are the same body. I just wanted to check that they will fit before i take the fenders off to put them on.

Thanks