Identify these Zenith parts?

[Tom Albrecht]

I've got some Zenith replacement parts packets that I'm inclined to pitch unless someone knows what they are:

103-287 diode

103-194 diode

903-190 diode kit

For the above, I'd simply like to know what kind of diodes these are. Rectifiers (PIV, amperage)? Zeners (voltage, wattage)? Varacters?

800-860 4 Lead Capacitor 22-7504-01

The above looks like a big orange drop with 4 leads, and includes a notice that this is a critical safety component. What kind of a gizmo is this?