In article , Tom Watson wrote:
(WARNING - THIS IS A LONG AND BORING STORY ABOUT **** UPS IN THE
MANUFACTURING WORLD - YOU HAVE BEEN WARNED)
[...]

Anyway - this is how I came to own a copy of Machinery's Handbook and
know what I know about threaded tolerances.

Sorry if I bored you.

Boring? Not at all. It's an instructive case study in the consequences of
failing to examine assumptions. Thanks for posting.