GLOSSARY

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National Service Provider

(n.) A nationwide maintenance contracting company who supplies the sub-contracted services of a local technician to a customer.

Source: Lock Industry Standards and Training (LIST) Council

NCK

(sym.) Symbol for "no change key," primarily used in hardware schedules.

Source: Lock Industry Standards and Training (LIST) Council

Neck (of a Key)

(n.) 1. The portion of a bit key between the shoulder and the bit(s).
(n.) 2. The portion of a cylinder key between the shoulder and the bow.

Source: Lock Industry Standards and Training (LIST) Council

Negative Locking

(n.) Locking achieved solely by spring pressure or gravity which prevents a key cut too deeply from operating a lock or cylinder.

Source: Lock Industry Standards and Training (LIST) Council

Nest

(n.) A unitized group of safe deposit boxes.

Source: Lock Industry Standards and Training (LIST) Council

See also: "tumbler nest"

Neuter Bow

(n.) The bow of a key which is unidentifiable to a particular lock manufacturer.

Source: Lock Industry Standards and Training (LIST) Council

NFPA 101

(n.) National Fire Protection Association life safety code.

Source: Lock Industry Standards and Training (LIST) Council

NFPA 80

(n.) National Fire Protection Association standards for doors and windows.

Source: Lock Industry Standards and Training (LIST) Council

NFS

(abb.) Non-Fail Safe

Source: Lock Industry Standards and Training (LIST) Council

Nib Ward

(n.) A ward formed from a lock case by bending part of the case into the path of the key.

Source: Lock Industry Standards and Training (LIST) Council

Nickel Silver

(n.) A brass alloy containing nickel used in making some key blanks and tumblers.

Source: Lock Industry Standards and Training (LIST) Council

Night Latch

(n.) A rim mounted auxiliary latch bolt.

Source: Lock Industry Standards and Training (LIST) Council

NKR

(abb.) Non Key Retaining

Source: Lock Industry Standards and Training (LIST) Council

NLSA

(abb.) National Locksmith Suppliers Association

Source: Lock Industry Standards and Training (LIST) Council

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).

Source: Lock Industry Standards and Training (LIST) Council

Nominal Keyset

(n.) A keyset listed with an "X" prefix in a cross keyed cylinder designation.

Source: Lock Industry Standards and Training (LIST) Council

Non Key Retaining

(adj.) Of or pertaining to a lock whose key can be removed in both the locked and unlocked positions.

Source: Lock Industry Standards and Training (LIST) Council

Non-Control Chamber

(n.) A chamber in an IC which does not have a separate shear line for the control function.

Source: Lock Industry Standards and Training (LIST) Council

Non-Fail Safe

(adj.) A feature of a security device designed to remain engaged, for security purposes, during a power loss.

Source: Lock Industry Standards and Training (LIST) Council

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.

Source: Lock Industry Standards and Training (LIST) Council

Non-Keyed

(adj.) Having no provision for key operation Note: This term also includes privacy function locksets operated by an emergency key.

Source: Lock Industry Standards and Training (LIST) Council

Non-Original Key Blank

(n.) Any key blank other than an original.

Source: Lock Industry Standards and Training (LIST) Council

Non-Removable Key

(adj.) A key which has one or more cuts on it which trap the key in the lock upon insertion.

Source: Lock Industry Standards and Training (LIST) Council

Non-Removable Pin

(n.) Pertaining to a hinge whose pin can not be removed when the door is closed.

Source: Lock Industry Standards and Training (LIST) Council

Non-Reversible

(n.) Door hardware whose hand cannot be changed in the field.

Source: Lock Industry Standards and Training (LIST) Council

Non-Sized Closer

(n.) A door closer with infinitely adjustable closing force between specific sizes.

Source: Lock Industry Standards and Training (LIST) Council

Nose

(n.) The part of a non-cylinder lock which contains the keyway and rotates within a horn.

Source: Lock Industry Standards and Training (LIST) Council

Nose Puller

(n.) A tool used to remove the nose of a lever tumbler lock and allow access to the tumblers.

Source: Lock Industry Standards and Training (LIST) Council

NRK

(abb.) Non-Removable Key

Source: Lock Industry Standards and Training (LIST) Council

NRP

(abb.) Non-Removable Pin

Source: Lock Industry Standards and Training (LIST) Council

NSO

(abb.) National Safemans Organization

Source: Lock Industry Standards and Training (LIST) Council

NSP

(abb.) National Service Provider

Source: Lock Industry Standards and Training (LIST) Council

NUR

(abb.) Nurse's Key

Source: Lock Industry Standards and Training (LIST) Council

Nurse's Key

(n.) A selective master key used in a hospital keying system.

Source: Lock Industry Standards and Training (LIST) Council
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