I have brinks safe box model 5112D and I lost the key and where and how can I get another key thank you..

SOURCE: brinks fire resistant safe model 5059 instruction manual

To bad you dismantled. Here is the turning sequence:
General Turning Sequence Instruction NOTE SAFE MODEL 5054/5055/5059/5080/5081/5084/5111/5190/5195/5575/5700/5702.

Combinations consist of FOUR (4) positions (numbers).
BEFORE YOU START
Before you begin, please clear all settings by turning the dial CLOCKWISE (to the right)
three times. We also recommend to try the procedure with your safe door open first. Then
follow these steps:
TURNING SEQUENCE
1. Start the dial on 0 (zero).
2. Turn the dial to the RIGHT, passing your first combination number FOUR (4)
times and stopping at that number on the fifth time around.
3. Turn the dial to the LEFT, passing your second combination number TWO (2)
times and stopping at that number the third time around.
4. Turn the dial to the RIGHT, passing your third combination number ONE (1) time
and stopping at that number the second time around.
5. Turn the dial to the LEFT, to the last combination number and STOP.
6. Insert the key in the cylinder lock and turn RIGHT to open.
Your safe should now be opened.

SOURCE: brinks safe

OKAY! THIS IS WHAT MY INSTRUCTIONS TELL ME, HOPE THAT THIS HELPS! HERE YOU GO - TURN THE DIAL TO THE RIGHT PASSING THE 1st NUMBER 4 TIMES & STOPPING ON THE 1ST NUMBER THE NEXT TIME AROUND / TURN THE DIAL TO THE LEFT PASSING THE 2nd NUMBER 2 TIMES & STOPPING AR THAT NUMBER THE NEXT TIME SROUND / TURN THE DIAL TO THE RIGHT PASSING THE 3rd NUMBER THE NEXT TIME AROUND / TURN THE DIAL TO THE LEFT TO THE 4th NUMBER & STOP - NOW INSERT THE KEY IN THE CYLINDRICAL LOCK & TURN IT THE THE RIGHT TO OPEN.

SOURCE: need to reset combination on brinks digital home safe model 5040

the Brinks Company has a phone number you can call to get instructions on sending them a letter for a combination. It is 1-800-832-5834

SOURCE: LOST COMBINATION - BRINKS SAFE 5054

You can mail a notorized letter, requesting a combination...include model and serial number...mail to Sisco, 2835 E, Ana Street, Compton, CA 90221.....or fax it to 310-638-3489. I had the same problem and found out thru a Brinks website.

SOURCE: I have a brinks home security safe model 5059 key 3206

I'm pursuing a solution to the same problem. So far, I'm told that Brinks safes are made by Honeywell/Sisco. Call 1-800-832-5834 for customer service. They will play you a recording that will tell you what you need to do to get a replacement key ($7.95 - $10.95)