Update... I didn't make it over to the axle shop. I just got home from the hospital. My grandfather had either a seizure or stroke, and I actually beat the ambulance to their house. I was freaking out. He's fine right now and wanting to go home, but that's not happening until they figure out what happened. I'll try again tomorrow.
*edit* Attached is a forum-compliant pic, as well as a closeup of the threads. I knew there was a reason I wanted this thing checked out, and when I looked the axle over I remembered. The guy who sold it to me said the threads were a bit off from him having to hammer it out of the hub. The axle looks great otherwise, but I want this local shop to chase those threads and make sure it's ok before I send it to you. If they charge me anything, I'll take care of that part.