Help, after way too long the engine is going back together, and the 3/8" square drive bolt that holds the lifter valley cover grew legs. If anyone has one can you post a picture so I can remember what it is I'm searching for?

Thanks

 

Here you go:

 

Thanks for the picture.
I tried an orb plug last night, and it fit, I still can't find the original.
So for future reference, a -8, orb plug will work.
I just need to drill the hole in the center.
Parker Part Number: 05HP-8