Whats it

[flyingeagle52]

Does anybody know what this is

 

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[jeff of pa]

looks like a Radiator Cap or at least what's left of one



Look at the shapes of some of these Vintage ones

https://www.google.com/search?q=Rad...r+Cap&rls=org.mozilla:en-US:official&tbm=isch

 

[fella]

It's a Levarite!

 

[flyingeagle52]

Not a radiator cap too small
It's only about 1 1.25 in diameter
Not a thermostat either

 

[fireguy]

Looks like the end cap of an older shock to a screen door.