I had ordered one of the then commercially available
stamped tube types, but delivery was long in coming, so I made this one to get the job done. Once the
store-bought piece arrived, I was not impressed with its quality, but a member here was still willing to take it off my hands.
I continue to use my homemade socket...
I don't remember the dimensions I used__I scribed the nut's outline onto the
blued steel block__before whittling it out with an end-mill cutter, but
Michael Oritt claims it's a 2-3/16" and John Turney says a 56mm fits (his Metric socket was sourced from AH Spares). In any case, just make sure it's an
eight-point socket (for square or octagon-shaped fasteners) or it won't work.
Note: I would've bought a conventional forged steel socket, had I been able to locate one, but even all the machine-tool suppliers I frequent had none listed for this size/configuration.