Atlas MFC Bull Gear set screw

Go back to McMaster and search on self locking set screw. This should bring up the nylon patch cup nose set screws. The one that you want is first on the list.

Note that self-locking screws are like self locking or NyLok nuts. They are not intended to be re-used. However, McMaster only sells them by the package, not by the individual screw. So you will have a lifetime supply if the bull gear is the only place that you use them.

I have used them for decades, and they work quite well - once.
 
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