Nuke key

The nuke key is a miscellaneous item in Fallout.

Characteristics
This is the key to the nuclear warhead's control console, which is located on the fourth level of the Los Angeles vault under the Cathedral.

Location
This key can be obtained from the Lieutenant's locker on the fourth level of the Mariposa Military Base and then used at a console to nuke the Master. It sets up the nuke bomb timer.