do you own a caliper to messure the slot size, if so I would messure outside ene to end, inside end to end, slot size, and depth of slot or indent of the nut, Lisle makes a lot of sockets to fit axles, if you don't have a caliper try ane get close with a tape messure, or even lay a piece and rub a pencil to get a image, take it and match up a tool. Napa carries a lot of tools and if you have a AAA card you can get a discount, John