date ND lock

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ND locks can be extended up to 6" Extended Outside.  
The old D series lever lock was replaced by the ND lock in September 2003.
The Schlage ND is shipped with a driver/tailpiece when ordered with a LD, BD, or JD suffix.
The letters GD, HD, BD, or BDC should be put after the lock function. EXAMPLE: ND53BD GD = Schlage SFIC core HD = Construction core BD = Less core BDC = Plastic temporary construction core
On ND locks manufactured on or after January 30, 2017 only the SFIC lever and SFIC driver are needed to convert the lock from Full Size conventional (PD) or Full Size IC (JD, RD, TD) prep to S...
On ND locks manufactured prior to January 30, 2017, the lever, spring cage and tailpiece needed to be replaced with the SFIC lever, SFIC spring cage and the SFIC driver . N123-056 - Outside sp...
The lever may be missing the slot feature for the core locking lug.  Verify slot is in place.