the best way i have found, is to insert the tie rod in its area start the nut and put an open end wrench between the nut and the nut mating surface, the nut will tighten sooner since the wrench has taken up the excess space. as it is tightened it will wedge the conical shape of the tie rod in the conical mating surface on the other side.
tighten it as tight as you would when you were attaching it normally, then back off the nut remove the wrench then continue tightening the nut until it finally seats, if it still spins try it again. once is usually enough for me. flat washers will also work well.