Aluminum Shell Material, Nickel Plated Contact, Miniaturized Standard ConnectorUL Approved recognition file E115497. Shell components are fabricated from high grade aluminum with gray anodized finish. Contacts are copper alloy ? gold over nickel plate. Inserts are diallyl phthalate. Connectors are factory sealed to prevent leakage. O-ring seals in both plugs and receptacles make connectors pressure proof and water protected when mated. The cable receptacles and cable plugs are for jacketed cable. Solder termination to contacts quick positive bayonet coupling. - Note: Plugs mate with receptacles. If the selected plug has male (pin) contacts, the receptacle must have female (socket) contacts for the connectors to mate.Shell components are fabricated from high grade aluminum with gray anodize finish. Inserts are diallyl phthalate, providing high arc and insulation resistance under both humidity and thermal stress conditions. Connectors using female inserts feature a sandwich construction with the insert spun into a cartridge. Connectors are factory sealed to prevent leakage. Connectors are ideal for applications that demand a lightweight connector that meets MIL-C-5015 requirements.