[Sport69]

Those ones in the picture are the old bushings before removal. When the shoulder bolts are used you don't use the metal sleeves. They tighten up to the threads allowed by the shoulder bolt (preset tightness) and no further. I don't understand what your saying about being flattened on the ends, they have a larger end than the center which allows them to seat into position and no further? Shoulder bolts are cleaned and greased before assembly.