Oil gallery plug size?

[KnuckleDuster]

Can somebody tell me the correct size or part number for the plug that goes inbetween the oil filter passages under the #5 cap?
Apparently I threw the old one out when I tore this engine down, or just can't find it amongst all my junk.

Thanks!

 

[pittsburghracer]

Can somebody tell me the correct size or part number for the plug that goes inbetween the oil filter passages under the #5 cap?
Apparently I threw the old one out when I tore this engine down, or just can't find it amongst all my junk.

Thanks!

Like I said on Facebook I think 9/16 but I did a fast search and came up with this. Maybe a Google search of this part number with tell you.