Here's a
LINK:
Ttitle; ELECTRICAL CONNECTIONS FOR POWER CIRCUITS
3.3.1 has a table listing anode and cathode organized by range of disimilarity.
The internet version is dated 2000.
Good question ggonza, it would be useful to see some sort of ANSI reference or something. We always treated bus connecting bolts and washers like gold so we didn't lose them. An electrical contractor should really want those bolts to last a lifetime. You probably don't need a
machine screw shop to find them, we have Tacoma Screw around here.