You're talking about the aluminum "nut", right? The holder for the axle?
Did the exact same thing on my last tire removal/install. That aluminum holder is about the softest alunimum I've ever seen. While I never had a problem before, I cross-threaded it big time on this attempt. Much easier to get crossed than I thought. Made a mental note to really lossen things up on the axle install and work hard to let the holder find its center before putting any torque to anything. Like you, a $30+ lesson learned.