The new motor driven ND electrified locks shipped after March 14, 2016 do not require a solenoid. The Schlage ND-Series electrified locks shipped prior to March 14, 2016 would have used a...
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