[jon@harrison.ne]

I never rely on threads for an electrical connection. It will probably work for a while but one day it won't.I solder or screw a terminal to the sending fitting and ground the other end. Carefully drill a tap hole for a 2-56 screw in the sending unit going just deep enough for about 3 threads so you don't break into the inside of the unit and then tap with a bottoming tap (no end taper). I would first try to solder on a wire. TIX solder has a very low melting point-wash off the flux when done.