This locking plate secures a slotted round nut on a shaft assembly by bending its tabs into the corresponding slots of the nut and the groove of the shaft, preventing the nut from loosening under operating loads. Main dimensions follow DIN 5406, with a bore diameter of 220.0 mm and an outside diameter of 292.0 mm; the net mass is 465.0 g. Since it carries no rotating or radial load itself, its function is purely mechanical retention. The tab washer must be matched to the corresponding round nut by bore size, and correct fitting requires bending only the tabs designated for locking to avoid fatigue cracking. No lubrication or sealing is required, as the plate is a static locking element rather than a rotating bearing component.