Thingamajig ??

[Electricbutter]

It's iron and the round part seems solid with a hole in it

 

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[4x4x4]

......we've got plenty !...."Invalid attachments" .... No pics

 

[tamrock]

A thingamanocansee

 

[Tony in SC]

Flapper valve(check) for an old hand pump or check valve. The hole is the seal was attached. Is that pics of both sides?

 

[DCMatt]

Flapper valve(check) for an old hand pump or check valve. The hole is the seal was attached. Is that pics of both sides?

 

[Electricbutter]

Here are some different views and yes pictures of both sides

 

[Older The Better]

looks like a fly reel to me but that's just a guess

 

[BosnMate]

Are you sure it's a thingamajig and not a doohicky Never seen one, but does look like a valve.

 

[sutphin]

ITS A ??.

 

[coinman123]

Maybe an early version of one of those things you pull to start your lawn mower? Not sure what it is, looks early 20th century though.

 

[Beshires1]

Maybe a old boat cleat or buggy reins stay.

 

[4x4x4]

....Wondering if the"T" handle is threaded to lock the body to a rod ?

 

[Electricbutter]

Good idea 4x4x4 like a drill stop into the electrolysis tank she goes