M8372360218AR is a bayonet coupling receptacle dust cap designed to protect unmated MIL-DTL-83723 Series III connectors. This dust cap features shell size 18 with a black zinc nickel (Z) finish that provides 500 hours of salt spray resistance and electrical conductivity. The operating temperature range spans from -65°C to +175°C, and the finish conforms to ASTM B841, Type D specifications. Constructed from aluminum alloy, this QPL-approved dust cap is RoHS compliant and provides environmental protection while keeping impurities out of the termination area. It is ideal for aerospace, military, and harsh environment applications requiring reliable connector protection.