Quote Originally Posted by Captain Gizmo View Post
Per the diagram in post #36 below the name brand Sampo swivels have a nickel plated brass body and shaft. The bearing balls and rings are stainless. And as you point out "stainless" is a family of alloys with a lot of variations.
You can find Sampo swivels that are entirely stainless steel, if you really look and if you really want to pay the cash. They are used in Saltwater fishing.

My suggestion though is to use the brass ones and trade them out after a few seasons of us. More cost effective.