It’s a brass end peice to something

[Barrydang]

It’s brass. It’s got a hole in the bottom other than that it’s pretty solid.

 

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[Rookster]

I can't quite put a finger on it but thinking some electrical component.

 

[ticndig]

lamp finial

 

[smallfoot]

That's a device to put in coil springs to raise a vehicle's height. You slip the thing in between the coils and twist it with a ratchet handle. That's what the square hole is...

 

[smallfoot]

coil spring spacer

 

[cudamark]

Those were helical and not made of brass.

 

[Dzrt1st]

Metal fence pickett cap maybe?

 

[smallfoot]

Granted the pic I snagged was not "the" item..sorry! Those turned out being later model ones made by Mr Gasket and I think they were hard rubber. I have handled some like the OP's pix. They are rectangular. Made of lead compound similar to wheel weight lead.
If the item is indeed brass, it's probably not what I think it is. I know it's stated as brass. Looks like lead in the pix...jmho! I'd like to see if a 3/8" drive ratchet handle fit the hole and maybe a place cleaned enough to see the color of the metal. No it's not helical. They placed the narrow side between the coils and twisted 90 degrees. It was a poor idea from the beginning. Hit a bump and the suspension went to max and they came out all the time. Metal detectorists are finding them now.

 

[trdking]

Lamp post and coil spring guys. You did notice that this is only slightly larger than a quarter dollar? I like the finial idea best. and definitely not electrical in any way I have ever seen.

 

[Terry In Florida]

Granted the pic I snagged was not "the" item..sorry! Those turned out being later model ones made by Mr Gasket and I think they were hard rubber. I have handled some like the OP's pix. They are rectangular. Made of lead compound similar to wheel weight lead.
If the item is indeed brass, it's probably not what I think it is. I know it's stated as brass. Looks like lead in the pix...jmho! I'd like to see if a 3/8" drive ratchet handle fit the hole and maybe a place cleaned enough to see the color of the metal. No it's not helical. They placed the narrow side between the coils and twisted 90 degrees. It was a poor idea from the beginning. Hit a bump and the suspension went to max and they came out all the time. Metal detectorists are finding them now.

The coil spring boosters I've seen have a thread like groove, so when you twist they sink into the coil. this doesn't have that, the groove seems uniform all the way around.

I could see this mounted on the top of a lamp shade... Makes the most sense.

 

[Barrydang]

I don’t know what it’s made of now I scratched it on the inside of it to see it looked yellow but I scratched alil more and it’s clearly not. It is a soft metal but it doesn’t have the white patina most lead I found in the ground has.

 

[ANTIQUARIAN]

My guess would be a white metal finial from an electric outdoor light fixture.

Dave