We strongly suggest comparing the posted picture to your faulty unit! MOWER DECK SPINDLE BLADE BELT AND PULLEY KIT. 42″ 44″ 46″ and 48″ decks. Mounting holes do not have thread. MOWER DECK BLADE PART NUMBER. Width 2.5″ Outer Hole 3/8″ Length 17″ Center To Center 3-11/16″ Thickness. 164″ Center Hole 11/16″.