On Wed, 13 Jun 2012 14:02:38 -0400, Wild_Bill wrote:

I think it's easier, particularly these days, to get tripped up by so
many variations of fine threads since there are so many in use.

Machine parts ain't what they used to be.. now that there are often a
mix of metric and inch fasteners, very commonly, it seems.

It's not too difficult to distinguish 1/4, 5/16 and 3/8 coarse threads
from 6, 8 and 10mm threads by eye and fine threads of each are a matter
of recognizing the proportion between diameter and pitch.. but when the
threads start getting finer, such as on machine parts, assumptions and
guesses are more likely to lead to rework.

Jumping around from general hardware to optics and electronic parts
threads can get complicated.
In addition to machine-formed threads, there are numerous applications
where threaded parts are diecast, leading to more visual examples.

Standards are nice -- there's so many to choose from.

--
My liberal friends think I'm a conservative kook.
My conservative friends think I'm a liberal kook.
Why am I not happy that they have found common ground?

Tim Wescott, Communications, Control, Circuits & Software
http://www.wescottdesign.com