> similar to a screw but rather than having a rod of metal with thread
> on the outside it has a tube with a thread on the inside

I think those mounted in PCBs are called threaded inserts. eg they
could be used when mounting T03 transistors. Longer ones might
be called spacers or stand-offs. Often found where two or more
PCBs are stacked

Joe

*
*
**********
Quality PIC programmers
http://www.embedinc.com/products/index.htm
--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.