I can recall an instance where two threads worked together but just felt a bit too loose. You could jiggle the nut.
Ford Falcons are known for their mix of imperial and metric nuts and bolts. I'm not sure it went on up until the end in 2016, but I do know it occured in the 1988 -98 generation E series.

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!