rear diff bolts

[Benztech55]

I working on my wifes svx but 4.11 in for her I'm looking for a part number for the bolt that holds the shaft to the rear carrier.. you know the shaft that the axle slides over. I called subaru and they told me that I had to buy the hole carrier... if thats the case them I will just use the old ones but I don't want the o-ring the bolt to leak.... thank for the help

[svxfiles]

Pictures of what you are referring to would help.