Thanks for the tips. Yes, I meant to say axle flange, not disk.

This stuff is all brand new. I am thinking the stud was not seated/pulled into the axle flange, hence the issue.

It happens to to be the key nut, so that complicates things more.

I'm not sure if I can get to the back of the stud or not. Possibly if I destroy the disk dust shield. But the parking brake shoes, etc. might get in the way as they are internal design.

I don't see a way to grind the nut off. I'll get a shot with the camera tomorrow, but I am dealing with American Racing Torque Thrust II wheels, 11" wide with 5.5" backspacing.

Might be able to drill it out... not sure yet. Definitely no burs and/or grinding especially since the nut is nearly seated in the taper.

PITA.