Oil pan/timing cover bolt (318)

needing to find out what size the bolt is that attaches the front of the oil pan to the bottom ear of timing cover. Bolt goes in upside down strait up into timing cover thats threaded. i lost one and the other is a pain to get to so didnt wanna back it out . i.e. lazy lol.....it takes a half inch socket i know its about an inch long . just dont know the thread size thanks

zach

I believe those are 5/16-18 x3/4.