Dave wrote:

An earlier link posted from wiki tried to explain the difference between
a bolt and a screw. Just talking from an engineering point of view, I
was always taught that a bolt had a plain shank between the threads and
the head and that a screw was threaded all the way up to the head, minus
a thread. The reason I say this, is that I have spent over 25 years in
the aerospace industry and France, Italy and Germany all got together to
create a standard that could be applied.
Bolts were given one common number, followed by info that described the
thread diam and length of the plain shank and screws were given another,
followed again by the same sort of info, but was the total length of the
threaded portion and were then broken down into minute detail in the
standards books.

I'm with you on this one. However, in the same way that the
words uninterested and disinterested have been misunderstood and
misused, to the extent that they can no longer be used with any
certainty of communicating one's intent, knowing what is right no
longer seems to be enough.

Chris
--
Chris J Dixon Nottingham UK


Have dancing shoes, will ceilidh.