470pf 1kV ceramic capacitor. The RS one will do, or 117-300 as well, higher voltage, or 721-4981 which is cheaper, or 721-5004, or 117-366. All will work in place of this one, and one should be in stock.
The one you have there does not seem to be faulty, unless it has decided to go short circuit. All the replacements will be in a nice fetching blue dip.
