Need dimensions for square tube steel

[Comet]

Where on line can I find i.d and o.d. info on structural square steel tubing and/or pipe? I am looking to sleeve some 4"x4" 1/4" wall tubing/pipe and need as tight tolerance as possible for a little project at the house (non wheeling related). I googled for steel specs on line, but can't seem to find what I need.
Thanks

 

[heep70]

http://www.onlinemetals.com/

 

[Comet]

Thanks Greg. I actually did find that in my search, but couldn't find square tube in the 1/4" thick wall.

 

[Comet]

Ok, wait now I see it. Duh! Thanks again.

 

[heep70]

Remember inside the square tube the seam weld will fauck with ya.

What are ya sleeving? Smaller OD square tube?