This shaft locating washer is a component of a single-direction axial cylindrical roller bearing arrangement, designated WS81207, produced by INA. It has a bore diameter of 35.0 mm and a net mass of 80.0 g. As part of the 812 series, it works together with the K812 cage and roller assembly and the GS housing washer to form a complete axial cylindrical roller bearing. The washer provides the flat locating surface against which the cylindrical rollers run, carrying axial load in one direction only. Its precise, hardened running surface supports accurate axial positioning of the shaft and requires correct alignment with the mating GS washer and roller assembly during mounting. As a separate component, it must be fitted together with the corresponding K812 and GS parts to achieve the specified load-carrying capability of the complete bearing set.