In article 8h27g.57427$IZ2.31951@dukeread07,
dave wrote:

[...]

other faster simpler cheaper approaches welcome

thanks,

toolie :-)

Nut + backup nut. Screw against each other tightly.

Or put the nut on a bolt you don't need, set the nut on an anvil,
whack it with a hammer until it comes off the bolt tightly.

--
B.B. --I am not a goat! thegoat4 at airmail dot net