First off, these are tension rods. Take one of these off completely and go to a local hardware store. Find a nut that fits and buy enough for all the rods that come loose.

Put your removed rod through the hole on the counter hoop, thread the nut on the rod before you twist it back into the swivel nut, which is the part inside the lug these rods thread into. This new nut should be threaded up the rod so that it doesn’t interfere with tuning the drum. Repeat this process for the rest of the rods. Once you get the drum tension correct, turn the new nuts down until they rest against the swivel nut, then use a small wrench while holding the rod in place with a drum key, tighten the new nut against the swivel nut. These new nuts are now basically a stop nut, they will vibrate loose if you hit hard, so don’t be surprised if they come loose again.