You can make a bushing to fit arround the mounting bolt out of a plastic milk jug, aka shim stock #j14363-1, or you can give the bracket a bit of a twist, this will counter the wear in the hole the bolt goes through. For what ever the rason I have seen many left floor board rattle and only a couple right board rattle, some that really get loud, the twisting on the bracket, and it doesn't take much, works good