I'm not even certain that it is a nozzle.
I've called it a 'nozzle' because it's vaguely nozzle-shaped, it's hollow and its large-diameter end is threaded inside for about 5/16".
The major diameter is just over 1/2", so I'll stash it in my 1/2" rod & tubing bin. I really can't think where else to put it.
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