Does anyone know what is the size of the nuts on the rear shock mounts (upper and lower) on an '02 F350 SRW? I changed out my shocks this weekend, and the front was pretty straight forward, but the back mounts had a funky size nut. I ended up using a 17mm socket, but it was kind of loose. None of the metric or standard sockets in my toolbox fit right.
The 17mm even slipped a little while I was torquing them down. I've got them pretty tight right now, but I want to get these things torqued correctly as soon as possible.
Can anyone help out with this??

Thanks All!
Peter