I have the bucket seats out of the car and apart, but the hardware attaching the seat backs to the seat bottoms is incomplete. I have the shouldered bolts and three of four fiber washers. I also have two steel washers. My question is should the steel washer holes stop the washer at the shoulder, or should the holes in the washers be large enough to fit up onto the shoulder. If anyone has the dimension of the washers that would be great. Thanks in advance.