-N-

 
narrow stile
adj. pertaining to aluminum doors with stiles generally between 1-3/4 and 2-3/4 inches wide
 
national service provider
n. a nationwide maintenance contracting company who supplies the sub-contracted services of a local technician to a customer
 
NCK
sym. symbol for "no change key," primarily used in hardware schedules
 
neck (of a key)
n. 1. the portion of a bit key between the shoulder and the bit(s) 2. the portion of a cylinder key between the shoulder and the bow
 
negative locking
n. locking achieved solely by spring pressure or gravity which prevents a key cut too deeply from operating a lock or cylinder
 
nest
n. a unitized group of safe deposit boxes, see also 'tumbler nest'
 
neuter bow
n. the bow of a key which is unidentifiable to a particular lock manufacturer
 
NFPA 80
n. National Fire Protection Association standard for fire doors and other opening protectives  
NFPA 101
n. National Fire Protection Association life safety code
 
NFS
abb. non-fail safe
 
nib ward
n. a ward formed from a lock case by bending part of the case into the path of the key
 
nickel silver
n. a brass alloy containing nickel used in making some key blanks and tumblers
 
night latch
n. a rim mounted auxiliary latch bolt
 
NKR
abb. non key retaining
 
NLSA
abb. National Locksmith Suppliers Association
 
NMK
abb. a notation used to indicate "not master keyed" and is suffixed in parentheses to a regular keying symbol. It indicates that the cylinder is not to be operated by the master key(s) specified in the regular keying symbol; e.g., AB6(NMK).
 
nominal keyset
n. a keyset listed with an "X" prefix in a cross keyed cylinder designation
 
non-control chamber
n. a chamber in an IC which does not have a separate shear line for the control function
 
Non-Fail Safe
adj.: a feature of a security device designed to remain engaged, for security purposes, during a power loss
 
non-handed
adj. pertaining to hardware that is manufactured in a way, which allows installation on doors of any orientation without requiring modification or adjustment to accommodate the door orientation
 
Non Key Retaining
adj. of or pertaining to a lock whose key can be removed in both the locked and unlocked positions
 
non-keyed
adj. having no provision for key operation Note: This term also includes privacy function locksets operated by an emergency key.
 
non-original key blank
n. any key blank other than an original
 
non-removable key
adj. a key which has one or more cuts on it which trap the key in the lock upon insertion
 
non-removable pin
n. pertaining to a hinge whose pin can not be removed when the door is closed
 
non-reversible
n. door hardware whose hand cannot be changed in the field
 
non-sized closer
n. a door closer with infinitely adjustable closing force between specific sizes
 
nose
n. the part of a non-cylinder lock which contains the keyway and rotates within a horn
 
nose puller
n. a tool used to remove the nose of a lever tumbler lock and allow access to the tumblers
 
NRK
abb. non-removable key
 
NRP
abb. non-removable pin
 
NSO
abb. National Safemans Organization
 
NSP
abb. National Service Provider
 
NUR
abb. nurse's key
 
nurse's key
n. a selective master key used in a hospital keying system

 

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Appendix

This listing of the Locksmith Dictionary is courtesy of