Fits US Model 80 Series 1/1990-12/1997. Fits Non-US with full float rear axle FJ40, FJ55, FJ60, BJ&HJ 1/1979-12/1997. This plate ensures the rear axle lock nut stays locked in place. Bolts go through the nut and thread into this plate. Once tight, the nut is safely screwed to the spindle and bearing preload will not change.