Just in case you have a hard time getting a big enough O.D. fender washers w/ the correct I.D. for the bolt...use a 4" round or square galvanized electrical box cover w/ 1/2" center knock-out for the jumbo washer. Bigger is Better when you have a couple hundred pounds hanging on them...You may have them already laying around.
dave brode wrote:Heck of an idea!