Blue Sea Systems Terminal Feed Through Connectors 22015/16”-18 black terminal connector for passing high current through hulls, decks, and bulkheads. Blue Sea terminal feed through connector 5/16 in. - 18 stud size feed through black terminal connector Black base made of reinforced thermoplastic 48 volts DC maximum voltage rating 250 amps amperage rating Tin-plated copper alloy stud material One piece serrated flange nut ensures secure connections Eliminates chafing and provides strain relief of cables Large terminals have a mounting face that can be gasketed or bedded to provide a water-tight installation #10 (M5) mounting screw holes Rated IP66 – withstands water from heavy seas