/38 indicates a straight strain relief clamp backshell, which provides strain relief and cable management without environmental protection. The '11' specifies the connector shell size. The 'W' designates the material and finish as Aluminum with a 500-hour Cadmium Olive Drab over Electroless Nickel plating. This prefix identifies connector accessories qualified to the MIL-DTL-85049 specification (formerly MIL-C-85049), which covers items like backshells, adapters, clamps, and protective covers for circular aerospace connectors.