Really, really dumb socket question.

I wish I had kept a one-page notice I still remember

One day I went down to our small-town Mopar dealer to pickup a friend of mine, parts man and "lackey" for the dealer. He was finishing up putting dealer bulletins into the catalog binders, and I absent-mindedly picked up a couple and read them.

This was in the mid-late 70's, when the manufacturers were making those #%#%^$%@% mixed and matched half metric, half US cars.

Basically after all the blater, what this CHRYSLER notification said is that on certain models, THE NUT BEHIND THE WHEEL is METRIC!!!!

Worse yet, years later, a line GM mech was in our store, having come from down the block from "fasteners" He had a bolt which he "KNEW" was metric because it had a 10mm head, yet fasteners could not come up with a metric bolt with the right size and pitch.

TURNED OUT to be a standard, plain old 1/4" USS thread with a 10mm head which GM had thoughtfully put on top!!!