Replace OEM:

Murray: 94592, 95309

Fit Models:

Scotts: 46" Lawn Tractor 46580x8A

Yard King: Performance 46" Lawn Tractor 46580x89A

Murray: LT20460, CLT20460; 

Briggs/Murray:  46" Lawn Tractor 465600x48A, 465615x99A

Notes:

12 point splined ID

OD 5 1/16"  Height 15/16"