storage room vs night latch

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Night Latch (NL)= key retracts the latch momentarily to allow entry. When key is removed, the latch will extend and locks the door (momentary unlock). Class Room (Lock/ Unlock)= key unlocks...
Follow step 6 of the 18-R instructions to convert trim function to Night Latch(L-NL).
To convert the Von Duprin 9975NL(Night Latch or Storeroom) to 9975L (Classroom) exit function follow these steps (Note: the mortise lock is shipped as Night Latch from the factory): Turn the NL ...
To convert the Von Duprin 9975L to 9975NL exit function follow these steps (Note: the mortise lock is shipped as Night Latch from the factory): Turn the NL screw on 7500 mortise lock counter clo...
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 ...
Communicating Store Room Lock—Deadlocking latch bolt by inside lever except when locked by key. Non-removable blank plate outside.
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...