[GreenKeys] ASR-33 mounting screws

[Chris Elmquist]

Hi Jim,

Yes... I performed an exhaustive online search including McMaster-Carr
and many, many other bolt and nut suppliers and the closest I came was
one outfit offering #6-40 allen head cap screws at 3/4" long, which I
would have had to cut to length.  They were only available in 100 pc
boxes at .19 / screw so I continued the search.

Here in Minneapolis, we have a pretty robust market for this kind of
stuff but every place I went or called had never heard of #6-40 and that
includes quite a number of machine shops, hobby shops, sewing machine
repair shops and gun shops.

So, I suspect this particular screw was one of those made by Teletype
themselves or #6-32 clearly won whatever war took place over threads
in the 1960's :-)

Chris N0JCF

On Sunday (05/16/2010 at 01:01PM -0500), Jim Haynes wrote:
> Seems like McMaster-Carr often gets mentioned when odd screws and other
> odd stuff are needed.  Also if you live in a place of some size you
> might look in the phone book for a bolt and screw supply place.
> Some of these primarily deal in construction fasteners, like those
> screws that drill their own holes and then tap them; but others
> are more general industrial suppliers and have a lot of odd stuff.
>
> Hardware stores vary a lot in what they carry.  The other day I got
> some 2.5 millimeter screws at an Ace hardware (and had a very
> helpful salesman) but not all Ace hardware stores, or any other,
> carry such a range of sizes.
>
> Teletype made a lot of its own screws, so they could make whatever
> they wanted and they chose 6-40 and 8-36 and other sizes that are
> standardized but not commonly used.  In the 32/33 line they tended
> more to buying screws ready-made for automatic screwdrivers, and
> thus used some of the more common sizes.
>
> I would have thought that the ones that hold a 32/33 base to the
> pedestal were common sizes, as they look bought rather than Teletype-
> made.
>

-- 
Chris Elmquist