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Why shouldn't electric plugs screw in?
(programming.dev)
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They do make twist in plugs…
Your standard (north american) plug is a NEMA 5-20R.. the twist in (locking) variant is NEMA L5-20R.
I see locking plugs most commonly used in applications where the cord may have a bit more force to it.. example: a ceiling mounted receptacle serving movable furniture/equipment.
Theyre not used for standard domestic applications for all the reasons other userd indicated in this thread.
They also make NEMA plugs with threaded rings around the boot for applications in marine and other harsh environments.