Any clue as to what this might be?

[Locke]

Found near a Annapolis (bear a dock). The top doesn’t seem to come off, but might be rusted in.


Thank you!

 

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[bowwinkles]

Maybe a vintage screw insert.

 

[buck8point]

Possibly a Type of Quick Pin used for Holding Sheet metal being riveted to a frame, like in aircraft, or similar applications.

 

[Locke]

Thank you for the great suggestions!

 

[Rookster]

Black power measuring tool.

 

[EnvoyToTheMolePeople]

Black power measuring tool.

I was really confused until I realized you meant powder.

 

[Locke]

Rook3434 that’s exactly what it is!

Thank you!!

 

[Rookster]

I was really confused until I realized you meant powder.

Sorry bout that, it's happy hour. I did mean powder. And the top should come off.

 

[Fourman110]

Hmmmm I think it’s the top part of a lift off hinge.