Spindle Assembly OD of Pulley: 5 ", Specially designed: to replace 6 pt. star spindle shaft, Pulley included, No threads in housing, use self-tapping screws. Replaces Part Numbers: MTD 918-0116, MTD 618-0116, MTD 618-0111, MTD 618-0116A, MTD 918-0116B, MTD 918-0116C Stens Part Number: 285-863