KEMET's ceramic through-hole high voltage Golden Max radial capacitors are multilayer ceramic capacitors that are available in a variety of physical sizes and configurations. Termination materials and methods vary depending on the intended use. The C6 series has lead spacing, thickness equal to or less than, and body dimensions close to MIL-PRF-49467 specifications.
KEMET now offers the RoHS compliant C3XX Series in High Voltage configurations. Go here for more information