UNE-EN 2997-013
Aerospace series - Connectors, electrical, circular, coupled by threaded ring, fire-resistant or non fire-resistant, operating temperatures - 65 °C to 175 °C continuous, 200 °C continuous, 260 °C peak - Part 013: O-ring seal for jam-nut receptacles - Product standard (Endorsed by AENOR in March of 2009.)