Spindle Nut Kit, 1"-14 Nut / D-Washer / Nut Retainer, Light Duty Trailer Axle - Kit contains: 2 spindle nuts / 2 D-Washers / 2 Nut Retainers NOTE: Kit is not to be used on all D20, #8 and #9 axles. It should only be used on axles that have a factory installed "D" washer between the outer bearing and the spindle nut.