[Beowulf] flange clearance on sliding rails

[David Mathog]

> Is there some other standard way (3?) for mounting the fixed
> part of the sliding rails on racks with square holes? 

Don't know where you can buy these screws, if anywhere, but
have a gander at Patent 20050214099, which you can see as 
a PDF for free from here:

  http://www.freepatentsonline.com/

(It can be had from the USPTO as well but they require some oddball
plugin to view the patent images.)

This suggests to me another solution, which is to either use
a screw with a really big head, or to use two washers,
one that fits tightly within the square hole but around the
screw (to bear some of the load in the -Y direction) and a 
larger one that fits over the square hole (to allow the
screw heat to clamp to the front of the rack and not onto the
interior washer.  I'm thinking it might be easier to find
these two washer sizes than to find either the big headed
screw or the odd conical washers.

Regards,

David Mathog
mathog at caltech.edu
Manager, Sequence Analysis Facility, Biology Division, Caltech