Cliffcon IP68 Connectors – Cliff FM686804, This 4-way panel mounted male socket part of the Cliffcon 68 range of IP68 rated multipin threaded connectors for waterproof and rugged applications. It requires a panel cut-out of 13mm in up to 3.5mm thick and features gold-plated contacts. CliffCON® 68 FM686804 IP68 Male Panel Socket 4 Pin