National Stock Numbers (NSNs) are paramount to the efficiency and reliability of supply chain systems, providing a standardized method for identifying, cataloging, procuring, and tracking parts across military and government operations. By assigning a permanent, universal identifier to a component, NSNs ensure that buyers and logistical personnel can quickly locate the exact item they need for an operation, regardless of its supplier or manufacturer. While an NSN is intended to remain unchanged once assigned, certain situations call for redesignation, making it important that organizations can effectively navigate updates that affect sourcing, procurement, and system-level planning.
Before exploring NSN redesignation, it is useful to understand how such identifiers are established and tied to items in the first place. Managed by the United States Defense Logistics Agency and recognized by all NATO nations, an NSN is a 13-digit code that uniquely identifies material items of supply. While seemingly just a random string of numbers, each NSN can be broken down to derive information on its Federal Supply Group (FSG), Federal Supply Class (FSC), and National Item Identification Number (NIIN). This allows for a uniform means of classifying products with language that can be understood by all.
Numbers are generally assigned after a part has been reviewed for its unique characteristics, performance requirements, and logistical relevance. Once entered into the Federal Logistics Information System (FLIS), the NSN becomes the official reference used for stocking, procurement, and communication among agencies and international partners.
Despite the intent for stability, there are various circumstances in which an assigned NSN may require modification. NSN redesignation, also referred to as an NSN part number change, refers to an instance in which a cataloging authority determines an existing NSN no longer accurately reflects the part in question, its classification, or its logistical grouping. For example, rare cases may call for the adjustment of the item’s FSC or FSG to more accurately reflect the offering. When redesignation takes place, a new NSN will often be issued to a particular item, while the original NSN is superseded, canceled, or linked in the system for historical reference.
This process ensures that catalog data remains accurate, updated, and aligned with current technical specifications and supply standards. For procurement professionals, understanding redesignation is essential for avoiding misorders, ensuring compliance, and maintaining equipment readiness.
If a part undergoes a redesign, material change, or modification that is significant enough, the NSN may need to reflect an updated version. For example, if an item like a battery box upper cable assembly gains new shielding or performance features, its previous classification may no longer be the most accurate.
When cataloging authorities identify overlapping NSNs or misclassified items, they may consolidate them under a new, corrected designation. Conversely, a single NSN may be split into multiple entries if it was originally covering parts that differ in critical characteristics.
As the example shared before, FSG and FSC numbers may be restructured to support better grouping of components, necessitating reclassification under the new scheme. This often occurs when emerging technologies require new classes or more accurate organization.
Significant updates from OEMs, such as obsolescence, replacement, or reengineering, can drive redesignation processes.
Redesignation may seem like a routine update, but it carries significant implications. As such, operators should always endeavor to stay up to date on NSN changes, as it:
In fast-moving military and aerospace environments, even small cataloging errors can lead to costly delays or equipment downtime, making this level of data verification essential.
For those seeking dependable access to NSN-based catalogs that are replete with quality-assured components, Aero Spares 360 is your sourcing solution with our expansive selection. From aerospace hardware and sealing solutions to engine assembly parts and avionics, we ensure diverse offerings to address the many needs of our customer base. Take the time to browse structured lists like our BAE Systems aerospace and defense parts catalog to find high-demand offerings such as battery box upper cable components and other specialized items, or use our online search tools to narrow down needs by NSN. Once you are ready to make a purchase, you can fill out and submit an RFQ form on our website to receive tailored pricing options from our staff. We always offer rapid responses, so never hesitate to get started.
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