while digging threw a bin full of surplus amphenol connectors i found; MS3452W22-22P, and its accompanying pins M39029/29-215
data sheet:https://www.mouser.ca/datasheet/2/18/50 ... 775980.pdf
the pins (M39029/29-215) contacting dimension are exactly 3.6mm, the same as the live and neutral (L1,L2/N) pins on a j1772 port.
The j1772 pins are about 27mm tall, the amphenol pins are about 17.5mm. now if you factor in the tapers on both pins; amphenol about 16mm, j1772 about 19mm. 3mm difference.