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LOCKSMITH DICTIONARY
- 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 standards for doors and windows
-
- 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
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