Iron Ring

[OldQuest]

Roughly 4[SUP]1/4[/SUP]" OD, 2[SUP]5/8[/SUP]" ID. Maybe part of a wagon wheel?

 

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[A2coins]

Thats a good guess looks like a bearing cover of some kind

 

[Fourman110]

Pipe trim ring I believe.

 

[Tony in SC]

Looks like a thrust washer for a heavy wagon, maybe a logging frame.