Thanks so much for the reply.
I did make a copy of the screw and the only change was material & part number, however, the alternate material screw will not show up in the library browser.
If I can find it & use it, it will show up in my favorites & history but I am trying to set up the library for use company wide so everyone uses the same content library. Each persons favorites will be different (I think).
I guess what I need to know, is if there is a way to add the material field as a selection in the browser bar.