I just received the 11/16 diameter bushings and they look way too big for the bar diameter. I remeasured it and it is .687. So why is the bushing a lot bigger? I checked to see if the bushing was touching where it's split and it still looks way too big. I looked on dorman site and they don't have any 1/2" size. So should it be a 5/8" diameter bushing?