Install Washers and Test the Stopper

What happens here

Slide the modified plastic washer(s) onto the brass threaded post of the tub stopper. The washers should sit directly above the lower threaded section, effectively filling the unthreaded gap that caused the spinning. For added security and to ensure a tighter fit, consider adding a second modified washer if space allows. Once the washers are in place, reassemble the stopper and thread it back into the tub drain. Test its functionality by pushing it down to close the drain and pulling it up to open it. The stopper should now securely engage the threads, stopping the endless spinning and allowing for proper operation.

Goal: Secure the tub stopper and ensure proper functionality