Replacing wheel bearing hubs today. While taking things apart went to remove cotter pin to get to the main nut that is on end of axle .
I have seen a video that shows a spring type washer behind cotter pin, but it wasn't there on mine
Does anyone know the Name of spring washer ? Where I can get one ?

 

You don't need it, it's only function is to keep the castleated keeper from rattling.

 

This is from my '00 parts catalog. Guessing you are talking about #12.

 

Thanks so much ! Part is called a WAVE Washer

 

Glad I could help even though it seems I was wrong. Nothing new sadly. So you were asking about #13? Googled it. Very strange looking. Have not had to go into the front end that deep yet. Knock on my head, I mean wood. Why I love the forums. Always learn things. I downloaded my parts catalog from here. Maybe this will come in handy in future for you.

http://xjjeeps.com/