Bo-Ming Tong wrote:
I am looking for a small brass or stainless rod, approx 1/16" diameter
x 1/4" length, which has a threaded hole on the side, so that I can
screw on another rod perpendicular to it. This sounds like regular
hardware, right ? What is it called and where do I find it ? Thanks.


Never heard of such a thing. The closest thing
I can think of would be a hinged standoff:

http://www.keyelco.com/pdfs/p47.pdf
http://dkc3.digikey.com/PDF/T053/1456.pdf