[Mikendebbie]

To add to the pics from DutchmenSport - here is my knob.
I added the metal+rubber washer because the bare knob (like Dutchmen's above) started not keeping the door closed...I suppose from the rough ride. I got the idea from someone on the forum. I just screw the knob in a few turns to snug it to the door. The rubber gasket keeps it from damaging the door. This has worked well for me.

Also someone in this thread mentioned they had some smaller mystery knobs - well I do too. See pic...some of this stuff is mine - but I think the dealer tech pointed to all this stuff during the pdi 2 years ago and mumbled what all this stuff was for. I think it was left-overs from the TV installations. Oh well - it lives in this drawer until DW claims the drawer.