I measured 5.94mm diameter on the solid aluminum shafts. Length of the exposed portion of the shaft is about 10.20mm. Diameter of the threaded portion of the bushings measured 7.75mm. Length of threaded portion of the bushings measured approximately 9.70mm. Body of pots measures 16.51mm diameter. "ALPHA" and the value and taper ("B" for Linear...) of the pots is stamped into the metal on the back of the case. Tinned case is very easy to solder to. Taper and value of pots is also imprinted in white on tops of the brown phenolic decks. Very smooth action. Also a good choice for your stomp box project and other applications. Mounting hardware including two extra 11mm hex nuts are included.