Reply To: Fixing buggered crank threads

[Buccaneer]

You don’t show how bad they threads are, but one trick I’ve seen
and used was to take a good nut the correct size and thread,
and cut through it with a hacksaw vertically. That way it will
expand some, and may start onto and help clean up the
bad threads. Your could expand the nut even more before
you try, so you can get it past the bad threads easily, then
once past, clamp the nut kerf tight with a vise grips, and unscrew it.
Only out a nut by trying it.

Prepare to be boarded!