<p>A spindle nut (10) and a locking device are disclosed for securing the nut (10) on a spindle (50) in a non-rotative position relative to the spindle (50). The assembly comprises the spindle nut (10), an antirotation spring (20) and a spring backup plate (30) mounted on the spindle (50). The antirotation spring (20) and spring backup plate (30) may be formed as a single unit.</p>
