They are nuts for air shocks. they go on the shock side (not the trunk side) of the double sided stud and use a conical washer with a bigger hole. If you still need one send a PM and I'll send one for the cost of shipping. Do you have the washer that fits over the shoulder? The top part of Air shocks are wider than stock shocks so this allows the shock to be farther from the brace - the shoulder on the nut is the same diameter as the shoulder on the double stud. If you buy new air shocks you get a pair, so I have extras.