piece 1 7/8-14 UNF lathe threaded shaft with a 1/4" relief groove at .725" diameter and a 1.438" diameter end at 1.300 long the total shaft length 2.7" internal hole at 1.250 deep and thread to 1/2-13 unc
pieces 1 and 2 assemble this is how i lathe threaded the 7/8-14 unf shaft to where the threads wil always line up as the nut runs across it.
all 3 pieces assembled to show the nut running through all the threads
piece 2 overall diameter is 1.500" internal is 7\8-14 unf small diamond knurll across the outside for grip and is .750" long
piece 3 1.438 diameter end at 1.250 long 1/4" groove at .725 diameter large shaft thread to 7/8-14 at 1.500 long including groove small shaft threaded to 1/2-13 unc at 1" long including relief grrove