"Winston" wrote in message
...
Jim Wilkins wrote:
...
Secure the ball from rotating with Vise-Grips, jack up on the screw and
turn
the nut.

Could be. That compressed lock washer is probably
providing a lot of force axially so I figure if the
nut was going to engage and unthread, it would have
done it by now. The nut just turns and turns with
no movement along the stud axis.

--Winston

I suspect the stripped threads have released enough of the pressure. If you
can't get a jack under the screw, hook up the trailer and lift its tongue.
You may be able to tighten the hitch latch nut enough to keep the ball from
turning.

jsw