indicator deadbolt with key

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The ND40 does not have this option.  You will need to look at a mortise lock, L9496, or a deadbolt such as the B571.
This can be done but will require a submission through the RFQ process.The Schlage B500 and B600/700/800 deadbolts have an inside indicator rose option for select functions. The indi...
The replacement for the D871 is the D271.  None of the parts are backwards compatible. D271 description:Thumbturn x Occupancy Indicator Deadbolt thrown or retracted by turn unit only. ...
The Falcon D400 and D800 series (including the D871) were discontinued in 2008.
Both the Schlage B571 and Falcon D271 are occupancy indicator deadbolts that read "IN USE" and "VACANT".  The B571 is shown below but the indicator will be identical to the D271 (see Figu...
The L496 is a Small mortise deadbolt lock:Deadbolt lock with "occupied" indicator - Deadbolt is operated by key outside or thumbturn inside. Furnished with 09-611 per L583-375 indicator. When ...
Hotel lock with 09-611 "Do not disturb" indicator - Latchbolt is operated by key outside or by knob/lever inside. Outside knob/lever is always fixed. Deadbolt is thrown or retracted by inside thumb...