http://www.mcmaster.com/#90184a115/=rhs0f0

I would like to download the files that are in the pulldown menu to the right
of the picture  but I can't get the program to find it. Its not just this
page, there are 1000's just like it.  I would like to get all of these files
from the entire website.

Is there a setting that needs to be checked or is it even possible?
Thanks, 
Clint