Do you have drums? It must be 2wd.

Either way, you really should have the studs pressed back in. It ensures they go in correctly, and you can be sure they are well seated. The washer/nut trick may work, but I would be wary that the stud would stretch or strip with the required amount of force to do such a thing. It is going to take way more torque to seat that stud than it ever sees when it is properly torqued to the wheel.

So, in general. Pull brakes. Pull axle. Take it to a shop.

Good Luck,
Michael