What size are hood bolts?

Oldmanmopar said
They are 5/16 18 same as fender but different washer for early and late 67-72 1/2 and 72 1/2 - 76. You have and early hood

5/16 bolt ? That’s way too small I mean that’s damn near 1/4 inch around this bolt needs to be 1/2 I think as 3/8 too small