What size are hood bolts?

5/16 bolt is too small for hole . Can just push it in with no threads touching. 3/8 is close to fitting but doesn’t Catch a thread so I’ve been thinking they are 1/2 and some thread that I can’t figure out
Ok, if you're 100% sure on that, then someone has modified that hood and drilled and tapped those holes out bigger. In the picture you posted above, is that your stuff, or did you just post that for an example?

and FWIW, I agree about the need to find out first WHAT you need, before actually posting a wanted ad. Otherwise, how do you know what to ask for?

It looks like in this case though, you need to verify the size and thread pitch of those holes first, since it seems to be something "off the map".