Large Stainless Steel Washers are great for large and small bird cages. They are all Stainless Steel and they come in 2 sizes 1 1/2″ and the largest washer I have found 2″. If you have a 1 1/2 inch wire spacing put the 2″ Washer in-between the wires so it connects on the top and bottom or the right and left side. These hold very large birds well.
Used to spread the load of a bolt or screw over a larger area or to help prevent loosening under vibration. 18-8. A corrosion resistant steel alloy. The most common stainless steel for general hardware use.