I'm fully confident that it isn't cross threaded, since I installed it last. Hopefully I can get away with not breaking the stud but it's starting to look unlikely.
Like bikersmurf mentioned....breaker bar with a cheater pipe and angle it so you can use a floor jack to provide the force. Go nice and slow and just watch the nut/socket to see if it moves (once it moves switch back to just regular tooling). Just stand off to the side and wear safety glasses. I've had tooling break and it can be quite an experience depending how much force was used.
We have also used an angle grinder to cut off as much of a flat on the nut as possible. itll significantly weaken the nut and usually can just break it off then.
Exploding tool can be scary! We were tightening up some bolts with a allen head with a hytorc (hydraulic torque wrench) to 3000ft-lb's. Engineering had ordered the wrong bits that weren't rated that high. Well got to like 2200ish ft-lbs and BOOM, sounded like a gun shot. Thankfully the bit just sheared and no parts went flying. But we had guys come running from other compartments of the ship asking wtf had happened.....thankfully non of us crapped ourselves
