On Jun 23, 2:22*am, mike wrote:
I have an old Dayton 2Z543 hand held 115V spot welder.
The tips screw into the tongs, but the threads are stripped.
Been using it that way for a decade, but it's got to the point
that I'm burning holes when the tips tilt and the contact area
is small.

Or maybe a highly conductive heli-coil?

Thanks, mike

How about making something like a keensert out of copper? That is a
bushing that is threaded on the inside and outside.

Dan