Head Scribe's keycard

The head scribe's keycard is a quest item

Location
It can be acquired by pickpocketing it from Head Scribe Taggart in the Brotherhood of Steel Hidden Valley Bunker. It can also be looted from his corpse.

Uses
The head scribe's keycard is one of the three keycards required to start the self-destruct sequence during For the Republic, Part 2, Render Unto Caesar, The House Always Wins or Wild Card: Side Bets.