The door thickness looks to be around 1 13/16".
Please let me know if you sell the appropriate pieces for adding a keylock to my door.
Thank you,
Harold
Hello,
Take a look at the Andersen hardware related on this page, including the 82-316 and 82-317. Do you see the round protrusion in the back? See the little rectangular slot in that protrusion? The spindle for the 82-043 thumb latch would go through the mortise lock and into that slot. You would install the 82-316 or 82-317 on the opposite side of your door and have the latch and keylock spindles meet inside the door.
Keep in mind that you might have to cut a little off of both the thumb turn and the key turn tails so that they comfortably meet in the middle of the mortise latch. In the case of new installations, we recommend that you seek the aid of a professional since it can be a bit tricky and would require making permanent modifications to the door.