Spindle Assembly / MTD 918-06991, 618-06991.  Use self-tapping 9466.

Alt. Rotary 15520

MTD most 200 and 700 series mowers with 42" deck

No threads in housing, use self-tapping screws, OD of Pulley: 5 1/2 ", Specially designed: to replace 6 pt. star center hole, Includes nut, spacer and grease zerk, Height: 6 3/4 "

SF-A