I’m just guessing, but looks like a water thingy.
Also guessing there’s threads on the female side...if they’re SAE or NPT, that should rule out anything on the tractor??
Some attachments are SAE, but can’t think of anything using a fitting like that....
I found a large fine threaded lock nut under a tractor years ago...turned out to be a Stihl trimmer part that fell off a shelf. Bugged me for a couple weeks, so I understand completely!
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