On Thu, 23 Feb 2006 14:10:22 -0500, "pogo"
wrote:

Lets see if I understand this. 1/2 inch diameter = 4/8, then take out
3/8, leaving 1/8 divided by 2 leaves 1/16 inch for set screw thread.
Do you care if the end of the set screw extends out from the surface?
Won't catch on anything?

Seems like not many threads for a set screw.

I re-measured and the interior hole is 1/4" ... not 3/8" . Good catch!

Sounds like you are looking for cut-to-length precision finished
[centerless ground] tubing.

Found these on Google
http://www.precisionmetalcutting.com/
http://www.greendon.com/tube_products.htm
http://www.copperweld.com/pdfs/DOMBro.pdf
and a bunch more

Uncle George