This is a Cub cadet 723-3022 5/8" ball. It fits 

Cub Cadet 1000 (2050550U, 2050540U) - Cub Cadet Garden Tractor - Clutch
Cub Cadet 1250 (2050059, 2050610U, 2050630) - Cub Cadet Garden Tractor - Hydrostatic Disconnect Attachment
Cub Cadet 1340 (141-631-100, 140-631-100) - Cub Cadet Garden Tractor - Drive Line
Cub Cadet 1604 (142-580-100, 142-582-100, 142-582-399) - Cub Cadet Garden Tractor - Creeper Drive
Cub Cadet 1604 (143-580-100, 143-582-100, 143-582-399) - Cub Cadet Garden Tractor - Creeper Drive
Cub Cadet 1604 (144-580-100, 144-582-100, 144-582-399) - Cub Cadet Garden Tractor - Creeper Drive
Cub Cadet 1440 (144-633-100, 142-633-100, 145-633-100, 143-633-100) - Cub Cadet Garden Tractor (SN: 821060 - 880000) - Drive Line
Cub Cadet 1440 (14A-663-100, 146-633-100) - Cub Cadet Garden Tractor (SN: 880001 - 899000) - Drive Line
Cub Cadet 1450 (2050065U, 2050660U) - Cub Cadet Garden Tractor - Transmission Case, Diff, Hydro Drive, & Rel Parts
Cub Cadet 1535 (140-641-100) - Cub Cadet Garden Tractor (SN: 800000 - 821059) - Upper Steering
Cub Cadet 1541 (141-652-100) - Cub Cadet Garden Tractor (SN: 816509 - 821059) - Drive Line
Cub Cadet 1604 (145-580-100, 146-580-100) - Cub Cadet Garden Tractor - Creeper Drive
Cub Cadet 1606 - Cub Cadet Garden Tractor - Creeper Drive
Cub Cadet 1641 (14A-653-100, 146-653-100) - Cub Cadet Garden Tractor (SN: 880001 - 899000) - Upper Steering
Cub Cadet 1782 (140-712-100, 141-712-100) - Cub Cadet Garden Tractor (SN: 800000 - 821059) - Drive Line
Cub Cadet 1782 (142-714-100, 144-714-100, 145-714-100, 146-714-100, 143-714-100) - Cub Cadet Garden Tractor (SN: 821060 - 889000) - Upper Steering
Cub Cadet 1806 (147-640-100, 148-640-100, 149-640-100) - Cub Cadet Garden Tractor (SN: 756300 - 799999) - Clutch & Controls
Cub Cadet 1861 (142-663-100, 140-671-100) - Cub Cadet Garden Tractor (SN: 821,060 - 836,000) - Drive Line
Cub Cadet 1862 (140-681-100, 141-681-100) - Cub Cadet Garden Tractor (SN: 800,000 - 821,059) - Drive Line
Cub Cadet 1863 (145-664-100, 144-664-100, 143-664-100) - Cub Cadet Garden Tractor (SN: 836,001 - 880,000) - Upper Steering
Cub Cadet 1863 (14A-664-100, 146-664-100) - Cub Cadet Garden Tractor (SN: 880,001 - 899,000) - Drive Line
Cub Cadet 1864 (144-684-100, 145-684-100, 143-684-100) - Cub Cadet Garden Tractor (SN: 836,001 - 880,000) - Upper Steering
Cub Cadet 1864 (14A-684-100, 146-684-100) - Cub Cadet Garden Tractor (SN: 880,001 - 899,000) - Drive Line
Cub Cadet 1604 (2050598U, 2050599U, 205-0582) - Cub Cadet Garden Tractor - Creeper Drive
Cub Cadet 2082 (140-731-100, 141-731-100) - Cub Cadet Garden Tractor (SN: 800,000 - 821,059) - Upper Steering
Cub Cadet 2086 (14A-735-100, 146-735-100) - Cub Cadet Garden Tractor (SN: 880,001 - 899,000) - Drive Line
Cub Cadet 2182 (140-741-100) - Cub Cadet Garden Tractor (SN: 800,000 - 816,535) - Upper Steering
Cub Cadet 2182 (143-743-100, 144-743-100, 142-743-100, 145-743-100) - Cub Cadet Garden Tractor (SN: 821,060 - 880,000) - Drive Line
Cub Cadet 2284 (14A-734-100, 146-734-100, 145-734-100) - Cub Cadet Garden Tractor (SN: 864,501 - 899,000) - Upper Steering
Cub Cadet 580 - Cub Cadet Lawn & Garden Tractor - Creeper Drive