Solved: drivers side vibration at idle and low speeds

So for awhile now I've been dealing with a vibration that happens in park and slow speeds then goes away at around 20 mph. For a minute I started to think it was a transmission issue because I'm kind of an alarmist that way.

Turns out it a rusted bolt (screw actually) busted on an exhaust clamp and it was causing vibrations. Probably just going to drill the screw out and bolt it together. Anyone happen to know what the part is, I may just replace the whole thing. Also what kind of bolt should I get, regular old stainless from the hardware store?

One of the photos show where the clamp used to be connecting the catalytic to the exhaust. Probably not critical but if there was enough pressure to bust the bolt it's probably best to fix sooner rather then later.

Thanks.

 

Lots of us have lost that clamp and used a hose clamp on the drivers side cat heat shield. None on pass side.
The 2 bolts also are probably almost rusted out so you may need new bolts and some bigger washers.
You will get lots of rattling sounds from the rest of the exhaust heat shields (in your pic like heavy alum foil) all under the truck and larger washers fix that.