Help with finding threaded rod

[wusk]

We're looking for a aluminum threaded rod and nut with a 1/2" diameter at a 5' or greater length. We found one on McMaster with a 13 thread per inch (1/2'-13) but we cannot find a nut for that one. Any suggestions on finding any of these?

[Madison]

McMaster (and most anyone else) should carry 1/2-13 nuts of all types. Part no. 90494A033 is one such example.

If you're looking for something so long, it seems to be that you're considering building a linear actuation system? If that's the case, you don't want threaded rod -- you want multi-start acme screws.