catalytic converter bolt size
 

I did a search and only found that they are studs and pressed in or whatever.

I need to know the size of the bolt/nut.

My mom's 99 accord had two nuts come off from the bolts connecting the b-pipe to the catalytic converter and it's hella loud.

Just trying to head to wal mart and pick up the right nut so I can make her car quiet again.

Thanks.

i wanna say they are 15mm bolts.. but dont take that as guarantee. I doubt they'd have that bolt size at a walmart

They are more punches than anything....not really bolts....my mechanic looked at it again and said I was correct and welded it shut.

No big deal. $20.