Export thread

I lost whatever socket fits this and I can't figure out what the size is. Does anyone know? It's fairly close to 1/2" but that's not it. I don't really want to be a whole set of sockets since I'd just lose 'em anyway.

Post Craftsman complete model number as well as all numbers from engine & engine manufacturer.

It's a 7/16th ... I got the bolt off. Now awaiting new parts from Sears.