Canning Pot Lid Knob Cleanup

Tomato Canning season has returned and my puny contributions involve maneuvering large pots of boiling water and, this time, cleaning up corrosion under the lid knob.

The corroded OEM screw vs. the shiny stainless steel screw:

The dark rim under the washer remained after hitting the area with sanding pad grits from 320 up through 1200, which seemed sufficient.

The OEM screw had a self-tapping thread, but I’d rather use a machine screw with an insert. Start by lining up the existing screw hole on the drill press and clamping the knob firmly in position:

Then drill to fit an M5 brass insert, while testing the hole depth:

Slather the insert with JB Weld epoxy, seat it in the hole, cure overnight, assemble in reverse order, and the lid was ready for the next canning session:

Yes, those are jars. The process is called canning:

Get over it, like I had to.