Dear Brett,
You mind this thread interesting
http://forums.sketchucation.com/viewtopic.php?f=81&t=37067
You will also find some metric thread textures here
http://forums.sketchucation.com/viewtopic.php?f=40&t=30534&hilit=+textures
Hope this helps.
If you find out how to download the models (first link) then please let me know.
Kind regards,
Bob