A850493911W is a QPL connector backshell accessory manufactured by Amphenol PCD, designed to provide strain relief, environmental protection, and EMI/RFI shielding at the termination area of circular connectors. This backshell is constructed from aluminum alloy and is available with various plating options including cadmium olive drab over electroless nickel. The product features coupling styles such as spin coupling, self-lock coupling, or direct coupling to facilitate easy assembly to connectors. Designed to meet SAE-AS85049 standard requirements, this backshell is ideal for military, aerospace, and harsh environment applications where reliable connector protection is essential.