Replacement prop nut.

3/4" - 10 UNC fits shaft sizes 1" to 1 1/8" 

7/8" - 9 UNC fits most shaft sizes 1 1/4"

Please note: There are two possible prop nut options for 1 1/4" shaft sizes on inboard wake/ski boats (e.g. 2015 and newer Malibu, Axis, Centurion, Supreme, Tige, ATX) might have a 3/4-10 thread size instead of the standard 7/8-9 thread size.

If your wake/ski boat has a 1 1/4" shaft, it is important to verify. 

If you're unsure of thread size, please contact sales.