Actually, that's the the seal I bought. Mine are Timken, I don't know if the National Seals are the same. I'm guessing so. It's a little tight around the bearing, though. I'm thinking it would be best to snap it onto the bearing then drive it in.
I haven't done anything since I ordered my parts. I'm wrapped up in a kitchen remodel project plus I need to get my hubs to a parts washer to remove the remainder of the 50 year old tar-like grease that's in them.
Good luck Dave.
