well its not missing its just not were its suppose to be, i went to change out my spout today looked underneith and the notch is there but no set screw.
i turn the spout and i can see the plastic slip fit thing, spinning with the spout.
The spout is junk---so get your tin snips and remove the shirt and get that screw out----do not be tempted to pull that off with the screw set to the pipe---you will score the pipe---making it difficult or impossible to get a tight seal===
I always go to the plumbing supply house for a Moen push on spout---the ones I've found at the home stores are a waste of time and money---
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