[Pushit2.0]

It is a M8 x 1.25 bolt that is about 1/2" long and stamped with a number 7 on the head and a lock washer. Hard ware stores normally sell bolts that will work, grade 8 is ideal and they normally have a 13mm size head vs the 12mm factor head on the bolt. I would use a little lock tight and torque the bolt to 18lb/ft.

~John