Have you ever wondered why your Cougar is Metric?

Now, that really did make me LOL. As did my better half when I explained my sudden merriment.
I love a touch of misunderstanding humour, the joy of English language.

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i started as a mechanic many moons ago, when most of the kit was AF with whitworth and bsf, then had to get metric, still got my orignal Draper 1/4" socket set which has af, metric amd ba sockets although ratchet and extensions etc have been replaced
a lot of the sizes do cross over and some of the other sizes are handy if you got a worn/rusted 13mm then you can tap a 1/2"af on as it's just slightly smaller but there are a number of other sizes that will cross over ie 15/16" is 24mm is 1/2" whit so more flexible use but mostly the older mechanic's have a lot of "old kit" not all will cross over to all 3 but a lot of af will go to metric

This might explain why my seldom used 19/32 socket was a perfect fit on the rear engine mounting bolts when I was stripping it apart last midweek, 14mm too small, 15, grips with some slack and slipped on the pretty siezed up bolts. 19/32 was a lovely fit and spun the bolts out without slipping.
Just need the new engine mount to arrive now.