This is such a lame question, but:
I can't seem to find the reference in IPC documents
regarding board thickness and tolerance,

Except in IPC-D-275 5.2.4 it says
"Board thickness shall be specified on the master
drawing and unless otherwise specified, shall include
metallic deposition"

I have always heard the tolerance should be +/-10%
(.062 +/- .007, for example)

But I can't find it!   help.....

Jack
p.s. If someone specified a thickness as ".093 nominal"
what would be acceptable on incoming inspection?

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