MTD Spindle Assembly with Double Pulley and Fittings. 5-1/2" & 5" Diameter. Replaces Part Number 618-0429, 618-0269, 918-0269. Fits 50". Length: 5.275", Pulley end: 5/8"-18 Splined, Blade end: 5/8"-18 Star. Years Used: '98 to Current. Used on Tractor 50" Decks. Replaces: MTD 618-0269 MTD 618-0429 MTD 618-0429 MTD 918-0269 MTD 918-0429 MTD 918-0429A