Could this be something other then a wing nut?

[allison86]

Why I ask is because it looks like old cast iron

 

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[DownNDirty]

Sorry just a rusty old wing nut.

 

[ScubaDetector]

Sorry just a rusty old wing nut.

I agree. One rusty worthless wing nut.

 

[trapperart]

I agree. One rusty worthless wing nut.

Me too

 

[vpnavy]

Get back into that hole and get the what that wing nut was attached toooooooooooooo!