what is storeroom function

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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...
MA581 is a Storeroom function mortise lock.
MA581 operation: Latchbolt operated by key from outside or by operating inside knob/lever. Outside knob/lever is always inoperative. Auxiliary latch deadlocks latchbolt when door is locked.
The 80 (Storeroom function) operates as follows: Key retracts latch (entrance by key only)
ANSI F84 Classroom Lock  Outside lever locked and unlocked by key. Inside lever always unlocked for immediate egress.   ANSI F86 Storeroom Lock  Outside lever fixed. Entra...
You must have the Von Duprin NL Cylinder plate part number 967484-89 to convert the 370 series controls from classroom function to night latch function. If new installation, use the NL cylinde...
The 510L can be converted to a nightlatch 510L-NL by changing out a few parts to the trim. See 510L to 510L-NL conversion instructions for required parts that will need to be added/r...