> > When inserting it into a "standard" crank threading, it
> > goes two turns and then locks up. The tool can be
> > seen at the following:
> >
> > http://www.wooljersey.com/
Exactly. You might start by using a brass wire brush to clean all the debris from the threads, and then use needle files to correct the damaged threading.
BTW, enlarging the photo shows the part number to be 392.
Good luck,
Fred Rednor - Arlington, Virginia (USA)