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
This only applies to the full size interchangeable cores. The SFIC mortise cylinders have part numbers for housings with construction cores (Disposable and Keyed).
Simply add (-ICX) to the end o...
UL437 is testing requirement that cylinders pass both a timed cylinder pick test and a forceful core/cylinder pull test. We have various cylinders to meet this need, please reference our price boo...