Help with ID

[OcdChaos]

I found this while detecting around in my backyard. Appears to be some thin copper cap of some sort. There are no threads inside of it, it is smoothed walled.

 

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[Al D]

End of an old electrical fuse

 

[Fourman110]

Suspect it’s the end cap from an old roller-blind.

 

[Fourman110]

Actually... roller shade not blind.