The 045531-0005-MS is a circular connector straight plug featuring a shell size 8 with 4 solder cup contacts arranged in an 8-4 configuration, designed for military battery and power distribution applications. The connector incorporates an aluminum alloy shell with olive drab chromate over cadmium plating, gold-plated copper alloy contacts, and a polychloroprene insulator with grommet seal endbell for environmental protection. It operates across a temperature range of -55°C to +125°C with a contact rating of 7.5 A at AWG20, insulator resistance of =5000 MO, and test voltage of 1500 Vrms, meeting IP67 protection standards per DIN 40 050. The connector supports 500 minimum mating cycles and withstands vibration up to 200 m/s² at 10 to 2000 Hz, making it suitable for harsh military environments, aerospace power systems, and battery interconnect applications requiring reliable, sealed connections.