This is one of two top rollers on my sliding patio screen door. I bought the home with it as is and I can't find a replacement anywhere.
It is 1" diameter and has a threaded nut with a bearing embedded in the roller.
The nut serves as an anchor for the screw that holds it to the door and also as a spacer so the roller aligns with the rail.
I can't use a different type of roller with screw and nut because there is no room for the it in the rail system.
There is no brand name on the door anywhere and the builder is no longer in business.
Help!