Nut size

[wrench78]

Can anyone tell me what size nut I need for this stud on the battery? Thanks for your help.

 

[A child of God]

Standard 10mm. It's the threads that matter. Go to any Ace Hardware store and ask to take a few nuts out to your truck. No store has ever given me grief about it.
It's probably the same nut as the one holding your steering fuse in place.