"Jeffrey Lindemuth" wrote in message ...
"CWLee" wrote in message
...

Can anyone here point me toward an authoritative history of
hex head nuts and bolts? I see square nuts and bolts in old
machinery and tools in museums, but I don't think I've seen
a hex head nut or bolt in anything built before 1900. Does
anyone know who invented/developed the hex head nuts and
bolts? When, where, why, etc? Any info on this topic
appreciated.

Many thanks.

--
----------
CWLee
"If elected, my highest priority upon taking office will be
to get the gazelles and the lions to negotiate a peaceful
solution to their long-standing differences." Tarzan,
Democratic candidate for King of the Jungle.

Just to return to the orginal question, a quick patent search show patent
#61504 Improved Bedstead Fastner, issued Jan 29, 1867, has a hex nut as a
component.

Jeff


I've got a history of the milling machine from the library that shows
Nasmyth's miller that he made for Maudsley about 1829-30 for milling
flats on nuts. The illustration shows a hex nut of large engineering
size. Presumably, before that they either forged them or filed them
to shape(or both). So we're back to the early 1800s, at least.

Stan