This locating washer forms the housing-side ring used in single-direction axial cylindrical roller bearing assemblies of the 811 series, working together with the K811 cage-and-roller unit and the shaft washer to complete the bearing set. GS81107 has an outside diameter of 52.0 mm and a net mass of 27.0 g, providing the flat axial bearing surface against which the rollers run in one load direction. The flat, hardened running surface allows axial load transmission along the shaft axis while permitting free radial positioning of the assembly, since the washer carries no radial guidance function itself. As a component of a three-part axial cylindrical roller bearing, it must be fitted together with a matching K811 roller and cage unit and a shaft washer to form a complete, functional bearing.