Winston wrote:
Bought a brand-new hitch ball to replace the dented
and cruddy old junky looking thing.

Whilst tightening it with medium force (using a short
1/2" ratchet without a cheater) I managed to strip
the nut threads (I think). The thing is now stuck in
the bumper and the nut just rotates backwards without
unthreading if I attempt to back it off.

Right now, I'm thinking that I will carve a slot
up the male thread and cleave the nut in two using
an angle grinder and cutting disk.

Better idears, please.

--Winston

Grab a chisel or a cheap screwdriver. Drive it between the bumper and
the top section of the ball to see if wedging it up some you can get a
thread to engage so you can back off the nut.

--
Steve W.