How to Request a National Stock Number: Sponsor, Forms, and DLA Review

To request a National Stock Number, you need a government sponsor. Manufacturers and suppliers cannot submit an NSN request directly; only a U.S. government agency, a military service, or a NATO partner nation can initiate the assignment through the Defense Logistics Agency (DLA) Logistics Information Service, which is the sole authority that assigns NSNs in the United States. Your role as a manufacturer is to get your business properly registered, prepare a complete technical data package, and connect with a government entity willing to sponsor the cataloging request.

Who Can Actually Submit the Request

NSN assignment is a government-to-government function.¹ The request typically comes from one of three sources:

A military service — Army, Navy, Air Force, Marine Corps, or Space Force logistics command that identifies a need for the item.
A federal civilian agency such as NASA or the General Services Administration that procures through the federal supply system.
A NATO partner nation’s National Codification Bureau, which can request a U.S. NSN through the international codification process.

The request usually starts when a unit or agency identifies a requirement for an item that doesn’t yet have an NSN. Common triggers include provisioning for a new weapon system, a non-stocked item being ordered repeatedly, or a locally purchased product substituting for something already cataloged.²

Whether Your Item Qualifies

Not every product gets a stock number. The Federal Catalog System requires NSN assignment for items subject to repetitive procurement, storage, distribution, or issue.² DLA Logistics Information Service applies specific criteria when deciding whether to assign a number:

Centrally managed items selected for central procurement and stockage, whether purchased centrally or locally.
Installation stock items kept at a consumer installation to support area requisitioners.
Recurring demand items with two or more recorded demands or requisitions within a 180-day period, regardless of which activity submitted the demand.
Products provided through Foreign Military Sales programs, NATO agreements, or bilateral government agreements.

These criteria come from DoD Manual 4100.39, which governs the Federal Catalog System.³ A one-time purchase that will never be repeated generally won’t trigger an NSN. The sponsoring military service also makes a judgment call about whether the item really needs a stock number before forwarding anything to DLA.

What to Do Before You Approach a Sponsor

You can’t file the request, but you control everything that has to be in place before one can be filed.

Register and Get a CAGE Code

A Commercial and Government Entity (CAGE) code is the unique identifier the government uses for suppliers. Your CAGE code and your part number are the primary identifiers DLA works from when cataloging your product. You obtain a CAGE code by registering your entity in the System for Award Management at SAM.gov.⁴ Registration is free and also satisfies the federal requirement for contractors to be registered in SAM before submitting offers on government contracts.⁵

Assemble a Complete Technical Data Package

Your sponsor will need detailed technical information about the product to submit the cataloging request. Have this ready before you approach anyone:

Part number and CAGE code — your manufacturer’s reference number that uniquely identifies the item.
A thorough item description covering what the product is, its function, and its application.
Technical specifications: performance characteristics, dimensions, materials, tolerances, and relevant engineering drawings.
Unit of issue and packaging data — how the item is counted (each, dozen, feet) and how it should be packaged.
End item application — the system or equipment the product is used in.

Incomplete submissions are the most common reason requests stall. If key characteristics are missing or the description is too vague, DLA’s cataloging specialist can’t do the classification work and will send the request back for additional data, essentially resetting the clock.

Find a Government Sponsor

Since a government entity has to initiate the request, building relationships with potential sponsors is where most of the real work happens. Each military service has a small business office set up to help manufacturers get into the supply chain, and DLA maintains its own small business program for the same purpose.² You can also respond to government solicitations on SAM.gov or the DLA Internet Bid Board System (DIBBS). Winning work through those channels establishes a procurement relationship that often leads to NSN assignment down the line.

How the Request Moves Through the Government

Once a government entity decides your item needs a stock number, the request follows a defined path.

DD Form 1348-6

The typical starting point is a DD Form 1348-6, “DoD Single Line Item Requisition System Document.” A base or unit supply section fills it out using your CAGE code and part number.⁶ The form captures the manufacturer’s name, catalog information, an item description, color and size where applicable, and the end item it supports.⁷

Service Review and Handoff to DLA

The base or unit forwards the requisition up to its service logistics command. The command reviews whether an NSN is genuinely needed and whether the CAGE code and part number are already stock-listed. If the service determines a new NSN is warranted, it sends the cataloging request on to DLA Logistics Information Service.⁶ You won’t interact with those internal service systems, but knowing the request passes through several review stages explains why the timeline stretches.

What DLA Does With the Request

When DLA Logistics Information Service receives the cataloging request, a specialist assigns three things: an approved item name from the H6 Item Name Directory, a Federal Supply Classification code, and a complete set of identifying characteristics.⁸ The specialist also checks whether the item duplicates something already cataloged. If it does, the existing NSN is assigned rather than creating a new one.³

Once cataloging is complete, the item data is loaded into the Federal Logistics Information System (FLIS), the central database for all federal supply items.⁹ From that point on, every government buyer, inventory manager, and logistics planner will find your product there.

Three Possible Outcomes

The item gets a brand-new NSN, it’s matched to an existing NSN because it duplicates a cataloged product, or DLA sends the request back asking for more data. That third outcome is common when the technical package is thin.

Timelines

DoD Manual 4100.39 sets specific deadlines for stages of the cataloging workflow. DLA Logistics Information Service must respond to Federal Catalog System collaboration proposals within 60 days, and within 120 days when NATO collaboration is required. Participating activities must forward collaboration requests to receiving activities within 15 days, and originating activities must submit cataloging transactions to FLIS within 20 days of receiving concurrence.³ The total time from first request to NSN assignment varies widely with the completeness of the data and the number of agencies weighing in.

Tracking Status and Getting Help

Your sponsor can track the request through internal DLA systems. Manufacturers don’t have direct visibility, but you can call the DLA Customer Interaction Center, which operates around the clock every day of the year:

Toll free: 1-877-DLA-CALL (1-877-352-2255)
Commercial: 269-704-7921
Email: dlacontactcenter@dla.mil

Once an NSN is assigned, you can verify your product in the system through WebFLIS. Access requires authentication through a Common Access Card, External Certificate Authority, or Federal Bridge credential, along with registration in the DLA Access Management and Provisioning System.⁹ If you don’t hold one of those credentials, ask your government point of contact to confirm the assignment for you.

Keeping Your NSN Data Current

Assignment isn’t the finish line. The data tied to your NSN has to stay accurate for the life of the product. If you change a part number, move manufacturing, modify specifications, or discontinue the item, the catalog needs to reflect it. Changes are processed as maintenance actions through the same military service or agency that sponsored the original assignment.²

Stale NSN data is a quiet way to lose government business. If procurement officers can’t match your current part numbers to what’s cataloged, your product effectively disappears from the system even though the NSN still exists on paper. Keep your CAGE code information current in SAM.gov, and tell your government point of contact whenever something on your end changes.

1
Defense Logistics Agency. How to Request a National Stock Number
2
Defense Logistics Agency. NSN Assignment Process Flow Guide
3
Department of Defense. DoD Manual 4100.39 – Federal Logistics Information System Procedures
4
Defense Logistics Agency. CAGE Code – Commercial and Government Entity Code
5
Acquisition.GOV. Subpart 4.11 – System for Award Management
6
Defense Logistics Agency. NSN Assignment Process Flow Guide
7
Department of Defense. DD Form 1348-6 – DoD Single Line Item Requisition System Document
8
Defense Logistics Agency. H6 Item Name Directory
9
Defense Logistics Agency. WebFLIS – Web Federal Logistics Information System