drive nd latch

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The default backset is 2 3/4" and the latch faceplate dimensions are 1 1/8" x 2 1/4". The latch supplied is the 13-047 deadlatch and 13-048 springlatch.
Schlage ND-Series tailpieces for extended doors are available by only two means, but are not available to order separately.   If an extended tailpiece is needed, then a complete lock ...
There are several part numbers available: Part Number Contents 09-774 SFIC driver & Spacer N523-091 SFIC driver D500-000 Spacer
The ND-Series FSIC driver is part number N523-127.