I had bought these for my Atlas shaper that I have sold. All threads and studs are 5/16". They have had little use and no longer fit my current machines.
Studs, 4 each: 1 1/2", 2", 3" , 5"
Flange nuts: 4 each
Coupling nuts: 3 each
T-nuts: 3 each, base width: 5/8:, slot width 3/8'