I had all of the side glass out of my car when I repainted it and the Helms service manual said I could use 1/4"-20x1" bolts, nuts and washers instead of rivets as an alternative. They recommend 3-5 lb-ft of torque on them. I did this on all 4 of my door windows and haven't had a problem at all, no noises, rattling or squeeks to speak of! The rivets listed are (385 189-S100). I guess you could go by that.