Uh Oh, those axles have Green bearings already installed. This means a couple things for you.....you need to change the axle tube ends to use the green bearings, they are a sealed bearing, not tapered, and need the Green bearing style races (non-tapered) in the ends on the tube.
Another thing, and you need to call Dr. Diff to clarify, I believe you need to remove the thrust button in the center of the PIG to use these axles, as the thrust button is used to set the endplay, a procedure not used for Green bearings, and I believe the thrust button will not allow these axles to fully seat in the housing. Maybe someone running Green bearings can chime in and confirm this, but I believe that this information is accurate!! Geof