This is how I install Brian's wooden lid rollers. It works really well.
There's a heat shield between the roller and the bowl.
Washers are tight against the bale nubs the length of rod in the bowl is minimized. You could use a thinner "jam nut" to make the bit in the bowl even shorter. That might require another washer or two on the outside. I tried "acrorn nuts", they would keep the threads a lot cleaner, but they stuck into the bowl too far and interfered with grate removal and installation.
All stainless.
I used a 1.25" x 1/4" Fender washer. You could use a 1" x 1/4" if you didn't want to the washer behind the bowl lip.