A8504912619W 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. The backshell is constructed from aluminum alloy and is designed to meet SAE-AS85049 standard requirements for military and aerospace applications. It features coupling options including spin coupling with lock wire holes to prevent accidental decoupling. This accessory is ideal for harsh and demanding environments where reliable connector protection is essential.