I know OP got it figured out, but found this with a quick search just for FYI to someone in the future:
https://www.autozone.com/nuts-bolts-...ece/848417_0_0
https://www.homedepot.com/p/Everbilt...e-more-details
Material is listed as steel, but it is in a auto parts store so it should be the correct bolt.
Home Depot is listed as zinc plated.
Either should work in a pinch.