On Jul 11, 8:31*pm, blueman wrote:
What (if any) lubricant can I use on a screw/nut to keep it from
binding over time? I may not need to loosen the nut for a decade or
more.

*The nut is part of the burner assembly on our range so it is
exposed to some heat (but not direct flame). It also gets some
moisture exposure due to the inherent moisture content in Natural gas.

Use antiseize from any NAPA or other auto parts store.

Joe