Depends on the yoke actually. (not sure if shaft spline count effects it).
I don't remember which is which, but depending if it's a 1310 or 1330, or cv or non-cv sometimes it's 1 1/4", while others it's 1 5/16".
Threads are the same, just the size of the nut varies.
I bought a set of 5-6 large sockets from harbor freight (used a 20% coupon). Pretty sure it was less than $20.
Be prepared to take an angle grinder to the outside of the socket to get it to fit.