Obviously atman is not following this thread at the moment, but I'll throw in the question anyway, to be dealt with later and/or in case someone else has an experience: What about getting the lock through as a carry-on? I'd like to carry both a U-lock and a cable lock with the bike. Could these put the whole undertaking into risk? My personal experience is coming up in less than 2 weeks. I had already a simple Topeak tool with hex bits taken away from me, but that was outside of the US.
Yeah I'm not a regular on the forum, generally, but I do like to stop by from time to time!
I never carry a lock with my foldie; I tend to treat it like my laptop in terms of security, which is to say, it's either on me or left somewhere secure. I have no idea if a U lock would be ok to fly with, honestly.