045498-0012 is a circular jam nut receptacle connector featuring a socket gender configuration with 55 size 20 solder cup contacts arranged in a 22-55 pattern, compliant with MIL-DTL 26482 Series I and Mil Battery standards. The connector is constructed from aluminium alloy shell with olive drab chromate over cadmium plating, while contacts are copper alloy with gold plating for enhanced corrosion resistance and electrical performance. It operates across a temperature range of -55°C to +125°C, supports a contact rating of 7.5 A at AWG20, and achieves IP67 water tightness per DIN 40 050 specifications. The connector demonstrates excellent electrical characteristics with insulator resistance of approximately 5000 MO and test voltage rating of 1500 Vrms, with a minimum of 500 mating cycles. This connector is ideal for military and aerospace applications requiring reliable, sealed circular connections in harsh environmental conditions.