You can use hardware bolts IF, IF, they are the same length AND the threaded portion is at least as long as the originals. OMC was great about making some non-standard bolts. In other words, take an old one to the store with you.
Part number was 302099, might be NLA.
Personally, I’d avoid the non-graded cheapo (weak) bolts. Also, I wouldn’t suggest Stainless Steel. They might sound like a good deal, but they actually will corrode in the hole worse than the steel ones, and are harder to drill out if you should break one in the future.
