Size of Bolts on 5 HP Side Cover?

[Harquebus]

Does anyone know what the thread pitch is on the Briggs 5 HP PTO sidecover where you'd mount the Torq-A-Verter?

Four bolt holes, tapped and threaded. I have no idea what size bolt goes there.
Thanks.

 

[CarPlayLB]

5/16-24

 

[Harquebus]

Many thanks, dear friend.

I didn't know where to look for such info, or even the correct terminology to use (which is everything).