Could this be....

[Rich in Houston]

I was thinking fuse, but I really don't know..

 

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[DEMON]

red arrow shows piece peened should be 2 3 or 4 of them

 

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[TreasureTales]

Resembles the bunghole screw-in cover for a metal drum or barrel. Too tiny for a 55-gallon drum. Maybe a 55-ounce drum?

 

[DEMON]

can you clean it see if any insulator on it ?

 

[Rich in Houston]

You mean like ceramic coating ?

 

[DEMON]

YES

 

[diggummup]

Oddly enough it struck me that it might be a part of an old gas burning lamp?
I know I have seen one of these before SOMEWHERE!

~Nashoba~

That's kinda what I was leaning towards.Or off an old gas stove.

 

[Rich in Houston]

No ceramic on it..

 

[Monty]

Still looks like some pictures I have seen of old timey artillery fuses to me. And is that another bung hole joke? Monty

 

[DEMON]

my " guss is a pressure safety plug "