I wan't to complain about emergency stop switch ?
The emergency stop switch automatically gets removed from it's place because of thread and nut design system. We heavily use stop switch for our application it is getting removed from it's place. Please use proper design than using thread and nut design for emergency stop switch.
Can you show us a photograph showing your assembly and the key in your panel cut out.
Perhaps use a key lock washer then...
The same way as you would be expected to mount a toggle switch to a drilled front panel.
Drill a small hole for the tab and place the washer behind the panel. The switch hole now has an anti rotation key to prevent the switch from rotating in the hole.
