It is very difficult to measure an outer diameter that is itself a 3-dimensional continuation of a diminishing taper (Morse number 0) and an inner diameter that is a 3-D continuation of an expanding taper. Right now, this evening, at an ambient indoor temperature of 19 degrees, using our Mitutoyo digital vernier, the measurements are: OD 7.5mm ID 6.45mm
but we will need to double-check this with our superb engineer/ machinist.
