Cub Cadet 710-04226 Blade bolt 3/4In.-16 x 5.85In. fits LT 1000 Series Riders & 618-04123B Spindle Assy. Fits 38In. 42In. 46In. & 50In. decks. Comes w/our 10-11963 spindle. Used w/our 10961. Replaces earlier design that HAD a grease zerk. Replaces: CUB CADET 710-04226 CUB CADET 710-1889