Classroom dead lock - Key from outside operates dead bolt. Turn from inside retracts but does not project dead bolt.

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Apartment Corridor Lock function is defined as a lock where the latch bolt operated by lever from either side, except when outside lever is made inoperative by a stop or mechanical means other than...
Classroom dead lock - Key from outside operates dead bolt. Turn from inside retracts but does not project dead bolt.
Dead lock - Dead bolt operated by key from outside and by turn from inside.
The Von Duprin 7500 mortise lock body ships in the NL mode.  Either the function of 7500 lock body has not been changed to the Classroom function or the NL Drive screw is not all the way down. Step...
  Tips for changing the function: The NL Drive screw will not be visible when lock body is set to Classroom function There is locktite on the screw that makes it seem like its turned down enou...
Dormitory or exit lock - Latch bolt operated by knob/lever from either side. Dead bolt projected by key from outside and turn from inside. Operating inside knob/lever retracts both bolts and unlock...
After rotating  the key to unlock the lock, you must return the key to its normal position to remove it. 
Deadbolt operated by key from outside or by turn unit from inside. Bolt automatically deadlocks when fully thrown. Latch retracted by lever from either side. Turning inside lever retracts deadbolt ...
MA531 (ANSI F20) Apartment Corridor Door Lock  Latch bolt operated by knob/lever from either side, except when outside knob/lever is made inoperative by buttons in face. Dead bolt operated b...
The L9466 Store/Utility Room lock can provide this functionality. Operation: Latchbolt retracted by knob/lever either side. Deadbolt thrown or retracted by key from either side. When the deadbolt ...