round lid or pipe fitting?

[BobinSouthVA]

Found this today at an old home site. Kind of reminded me of a mason jar lid but it is very heavy, possibly brass. It is 2.5 inches across and is threaded on one side with a lip on the other so it only goes on one way, I think. It also looks like the side has some flat places for a wrench?

Thanks for looking.

 

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[Bigcypresshunter]

Its an old plumbing drain fitting slip joint nut. I dont have a good pic but it is for either 2, 1-1/2 or 1-1/4 inch drain pipe. Yours should be for 2 inch pipe. (inside measurement) They still make these slip joint/compression nuts in brass, often chromed, but pvc plastic is commonly used in newer homes. Pot metal was also used.

 

[bradyboy]

Big Cypress is 100% correct.
It is an end nut for a compression pipe fitting
Likely used on iron pipe due to the dimensions
Usually made of galvanized steel, sometimes brass.
Sometimes brass because of a reaction of brass on steel that will clog a line in time
Its a modern nut.
Brady Boy

 

[wesfrye53]

Ditto

 

[BobinSouthVA]

Thanks for the responses.

I thought it was something like that but do not know much about plumbing and pipes.

Thanks