My K4 is missing a few small parts. PO provided a lot of the stock stuff he took off during his cafe' project

, but I am missing one of these bolts for the luggage rack and have not been able to locate a replacement.
09 BOLT, HEX. (8X80)
93000-08080-0B 002 $1.49
Local hardware store metric bolts of same description (M8-80mm, 1.25) seem too thick.
Am i mistaken about the thread size or do I just need a Honda original bolt?

Online stores are out of stock any other ideas to find a replacement?