I'm installing new vent window seals on my "66 SS. I bought new rivets from Chevy II Only for the hinges. The new rivets have a shoulder on them. When I installed the first one I got the rivet in real tight but the hinge is real loose due to the shoulder on the rivet. Is there a washer or something else that goes between the bracket on the window frame and the hinge bracket to tighten it up?