I haven't removed the old one yet, but it is approx. 13/32". I don't recall where I sourced the original one. What Cessna did is have steel going through aluminum all over the place without a bushing or insert, which is unbelievable. (Rudder pedals, cowl flap bellcranks, early tailwheel steering bellcranks (later ones Cessna used a steel bushing)). An extremely poor design practice fixed in some cases (McFarlane bushed rudder pedals, later t/w steering bushed bellcranks, etc.). I looked on McMaster's aviation section, but didn't see anything. I thought I had an extra set in the hangar and I looked all over the place. I even remember the bag they were in, but can't find them.