Hi Roger,
Just your everyday standard issue zinc plated.� On my first project, I tagged and bagged ever bolt, but went with mostly new nuts, bolts and screws.� I learned how time consuming it was to clean up these old pieces.� I realized they would quickly rust over again if I didn't get them replated.� �I decided this wasn't worth the fight.� I'm just not that much of a purist.� Now, on something like yours, I may consider a more purist approach.
Hawk