Drive Axle Do you know what size socket is needed to remove the Big axle nut?

1and 1/4 is to big and 1and 1/8 is to small,
this thing has alot of rust on it, you can't even
see the threads of the axle shaft, so if I have
to I can remove the hub and axle together, but
it looks like the 3 bolts take a special socket
do you know what I will need to try and get
the axle nut off or what I need to take the hole
hub off, Thanks Rick