I went to Home Depot and found some nuts and machine screws to do the job. 4-40 by 1 inch. I just hope that they don't cause shorts.
I had to buy a pack of 26 screws and another of 28 nuts. It is interesting that those numbers are not equal. I'd have to buy 13 boxes of nuts and 14 boxes of screws to have the same number of each.
There used to be a place called Feeney Hardware, where you could buy boxes of that kind of hardware. Another good place to check out: John's Photo Hobby on the Danforth near Woodbine. They had small diameter threaded rod and nuts to match, from which you can make bolts of any length. They also have various diameters of copper tubing which can be useful in construction projects. For example, two tube diameters that nest can form a simple bearing mechanism. -- Peter Hiscocks Syscomp Electronic Design Limited, Toronto http://www.syscompdesign.com USB Oscilloscope and Waveform Generator 647-839-0325