On Thu, 22 Oct 2015 18:09:08 -0400, wrote:

On Thu, 22 Oct 2015 13:46:24 -0700, Oren wrote:

On Thu, 22 Oct 2015 16:32:38 -0400, wrote:

You buy a "combo set". SAE and Metric. I have sockets and wrenches
in combo sets. It ticks me off American made cars require both.

Most current "american" cars are fully metric, but they use the
oddball 13mm and 11mm etc that are almost identical to SAE sises (1/2
and 11/16) as well as the unique metrics like 10 and 12

"Most"? My recent new four way lug wrench is SAE.
What is the thread on a 2002 Ford Taurus wheel stud, and what is the
size of the nut? (hint - neither one is measured in inches)
How about Chrysler/Dodge from about 1978 and up?
And Lincoln from 1988 on? They are not 3/4" AF nuts either - they are
19 mm - that's .05mm smaller than 3/4". And not 13/16, but 21mm. Just
.63mm smaller than 13/16"

They use 12mm studs.

What size is the drive on your medium metric socket set? 9.5mm?

We also see 1/4-20 threaded bolts with 10mm heads. Engineers seem to
be bi-polar.