dd's way works great and i have used another way and it may
sound dumb but it works great only if there is room on the stud,
put a nut down then a washer and then tighten with another nut
and work the first one off and it will titghten on the washer and
work off, also spray with wd40 and if you have a can of butane
spray it for a while to get it frozen and then work the nut against
the washer/nut and it worked for me, only if there is room,
good luck :wink: