This 12 slot trailer spindle castle nut measures 1″ in sized to fit standard 1 inch spindles on a wide range of trailer axles. This 12 slot style of castle nut is used on standard axles that use a cotter key to secure the castle nut in place. Features: 12 Slot Trailer Castle Nut for 1 inch Spindle 1-inch by 14 thread 1 1/2 inch outer diameter 12 Slots provide more paths for cotter key insertion
