AYP Replacement Spindle Shaft - Replaces 137646 AYP Replacement Spindle Shaft (285-464) comes with a top and bottom bearing and a lock nut Replaces (OEM) AYP part number 137646 Fits AYP mowers with 38" and 42" decks (use with the 275-280 pulley for 38" decks and the 275-284 pulley for 42" decks. Both sold separately) 7" length x 3/4" outside diameter Has a double hex spline for pulleys