I am replacing the double demountable hinges on my cabinets. Most of them are a breeze, but two of the narrow cabinets don't have the cutouts; instead, they just removed the plate and screw from the hinge, kind of making it single-demountable. They then just used a wood screw to attach the hinge directly into the cabinet.
However, I can't figure out how to actually get the screw out of the cabinet-side plate of the hinge. Here's a new hinge looks like just sitting on the counter (even though it kind of looks like it's attached to it):
It looks to me like there's some kind of nut/lockring on it, but when I try pliers and a screwdriver to loosen it, it just strips the metal of the nut/lockring away. The lockring turns along with the screw, no matter how hard I grip the lockring.
Does anyone have an idea how to get this screw out?
Also, in case it helps, the hinge is Amerock BP8700-G10