header stud/nut size?

[ttocs]

as I was driving over my gopro cameras I realized I had developed an exhaust leak. Popped my head under there today and confirmed a few bolts had worked loose, and on the very back passenger size there is a stud completely missing its nut. Any chance anyone can give me an idea what size/threading that might be? I will go up to ace and match it up and I know they don't care if I run in/out till I match it but in the name of saving some burns on my hands and trips in/out is there any chance anyone knows what the threads are for those bolts/studs?

 

[CC'S95GT]

I think they're 3/8-16. 3/4-1" long

 

[ttocs]

the stud is in there still just need the nut/threads. Thanks.

 

[g36 monkey]

the auto parts store usually has them, not even back behind the counter. They are just in the exhaust aisle as exhaust studs, separated by Fords, Chevrolets, etc.

Comes with a whole pack of studs and nuts for like ten bucks.