Pulley disk?

[Garabaldi]

Is this a piece to a pulley system to hoist things?

 

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[Lucas]

Not a pulley. Reminds me of a floor drain.

 

[SgtJim]

Looks like a drain cap as Lucas says, stops stuff from clogging the drain hole.
Jim

 

[mick56]

Looks to be brass? A cover to something.

 

[creskol]

Are you sure that isn't a top to that Fancy Feast can in the background?

 

[mrs.oroblanco]

Kinda looks like a flywheel.


Beth

 

[Bigcypresshunter]

What is the diameter? Where did you find it?