Sunroof bracket bolt loosens after use

[jgurnari]

1985 911

I repaired my sunroof, the issue was a slider bracket did not have the ridged adjustable nut and screw (pic 1 and 2). Picture 2 shows the driver side which was fine and intact…pic 2 arrows show there are 2 spring washers. I was given the replacement parts in pic 3…since mine were missing. The parts given had the small circular washer arrow in pics 3 & 4, which seems to be original but this is side that comes loose after time and falls apart. The side with spring washers that has not come apart, in fact I can not even unscrew that bolt… its solid.
What could I do to keep the bolt from coming loose…using spring washers instead of the small washer, pic 4, to me doesn’t seem to be a solution.

Anyone have this setup and what parts do you have…spring washers or the small cylinder washer?

[jgurnari]

Problem solved. I didnt use any washers and made sure the small ring in photo 4 is set into the hole of the bracket so the bracket can pivot. Because there were washers on the good side I "assume they needed to be on the other side. Wrong! Using the washers, they caught the side of the bolt, as the bracket pivoted, it would unscrew the bolt little by little till it fell off. no more! NOt sure why that doesnt happen on the other side ...but dont care.