M85049/90-13W03 is a QPL connector backshell accessory from Amphenol PCD designed for band lock applications. This straight-configuration backshell is constructed from aluminum alloy and features a cadmium olive drab over electroless nickel finish (W finish). The shell size 13 corresponds to a thread size of 0.875 inches (22.225 mm) and is designed for use with MIL-DTL-38999 Series III connectors. Backshells provide strain relief, environmental protection, and EMI/RFI shielding at the termination area of connectors, making them ideal for harsh and demanding military and aerospace environments.