This is a 3 pack of New Husqvarna / AYP / Craftsman Spindle Assembly Hardware Kits Part Number 14579 This fits these spindles (plus many more) 187292, 192870, 174356. Each Kit includes: 1 Blade Bolt with Washer 7/16"-20 X 1-1/4" equivalent to: 532193003, 193003, 174365, B1SB14457, 14457 1 Spindle Nut equivalent to: 137266, 139729, 178342, 400234, 532137266, 532139729, 532400234, 73040900, 73050900, 8901 1 Spacer (Gets installed between pulley and spindle) If this spacer is not installed, your pulley will not get tight! 4 Spindle Bolts, Hex Head Self-Tapping 5/16"-18 X 1-1/4" equivalent to: 138776, 157722, 173984, 532173984, 584953901