What size bolt is required for the bracket holding the catalytic converter?

What size bolt is required for the bracket holding the catalytic converter?

 

Does the bolt next to it fit?
If so, take that bolt and run down to the local parts store.
Most all of them have a bolt gauge.

Or take the bolt, and drop in a metric socket.
For instance, if it won’t fall into a M7 socket, but will an M8. It’s an M8 bolt

 

Assuming it's the same size as the bolt next to it, try sockets on the head. Typically for Toyotas, 14mm head = M10. 12mm head = M8. 10mm head = M6.

 

Thank you! My question was similar and your answer to the OP answered mine as well! I discovered a missing bolt and nut from the bracket where my catalytic converter is. It looks like some would-be thief aborted his plans before he could swipe it.



Anyway, I did as you said and tried my sockets on the remaining nut and discovered the 14mm socket is the one that fits. Now I'm off to the store!