Blade holder shaft for lawn tractor mower mower hub 22-278 MURRAY 491921MA 491921 091921 BLADE HOLDER SHAFT Length: 162 mm For models: 30540X29D , 30540X67F , 30540X98B , 30560X50C , 30560X51C , 30576X10D , 30577X31B , 46904x92A , 46907A , 30500x92A , 30504x92A , 30505x92A , 30545x92B , 30560x99A , 30577x8A Part No. : 22-278 Original part number reference : 491921MA 491921 091921 MURRAY