How far have the contact pins been designed to protrude for spring loading contact? I have noticed that the middle “common” pin appears to be recessed almost flush on my unit.
Please refer to link below of photo:
The middle pin is like that by design, there’s nothing wrong with your unit. That pin is supposed to connect to the side of the reader/key, to there’s no need for it to protrude (as it would only make it easier to break off)
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