I am looking for replacement seals for cooktop gas valves PN: 3185827. These would be the seals between the valve and and the manifold and the cap screw, that secures the valve, and the manifold. They appear to be high temp silicon material.
Unfortunately the valve seal that goes between the valve and the manifold was not a part that was sold individually and you would have to get the valve in order to get the seal. The valve part number 3185827 has been discontinued by the manufacturer with no suitable replacement.