Going the SC route and need to plug the hole, don’t want something too long that might lock a passage. I know it’s m10x1.5, just need to know the proper length.

 

If you're talking about the port on the driver's side of the block down near the dipstick then why not just buy the OEM plug?

*EDIT* It appears the OEM plug is unavailable now...



The OEM plug that came out of my car was ~5mm or so. You may have trouble finding a bolt that size?

 

That's the part I need, thanks for the diagram. Doing a quick search brought up it's NLA. McMaster's shortest bolt is 12mm. I'm trying to see if I can just use it for my oil temp gauge. I'm hoping the adapter I purchased isn't longer than the adapter used for the oil feed line.