I have a scotts 18hp/46 inch deck. Can someone tell me where to find the metal sleeve for the axle?

Hi,
Is it made by Deere or Murray? Numbers?
Peace,
Clarke

Murray. It's the pin that goes into the slot for the wheel and axle.

Hi,
If you mean the square key for the rear wheel/axle; it is 5/32" square x2".
Peace,
Clarke