Spindle Assembly Includes pulley, nut and grease zerk, No threads in housing, use self-tapping screws, OD of Pulley: 6 1/4 ". Replaces Part Numbers: MTD 918-04124A, MTD 618-04124A, Cub Cadet 618-04124A, Cub Cadet 918-04124A Stens Part Number: 285-846