No. The axle is threasded 3/4" -16 UNF.
Locating new nuts for this thing is difficult too. It take a nut that is about 1/2" tall. Rick at SS Sells nuts in the correct size but was unsure of the grade level of the nuts. On my series V axle ( complete housing going into a series IV car) the threads were perfect on the half shafts themselves, but the nuts were showing a bit of deformation. I bought some grade 8 3/4-16 yellow zinc plated nuts, bu they are so tall (about .85 to .89") that I don't think the nyloc portion will engage the threads. The nice part is there are more threads to engage the axle shaft itself., which I like especially since 180 ft pounds of torque is way up up there. More threads means less pressure per thread and therefor far less like to strip anything. I can not find any 3/4-16 guaranteed grade 8 nyloc nuts in the height of the original.
I think.... I am going to use the taller grade 8 nuts (more threads) with some blue loc-tite. Or maybe red. either way, a good Impact gun with be able to get them off some day. I am also going to heat the hub up to 80 to 90 degrees, while the half shaft is cold at 50 to 60. I want that extra squeeze on the taper fit. slid it on warm, zip gun the big nut, switch the socket to the torque wrench and torque to 180 quickly before the temperatures normalize. I'm use my hub puller tool with a 3 foot crow bar to keep it from rotting while torquing.
I really wish someone made one piece half shafts for these cars. I had looked into having a dana 44 made or modified for the car, but it was price prohibitive.