Disclaimer: This booklet is for general informational purposes only and does not constitute legal, financial, or business advice, and should not be relied upon as a substitute for consultation with a licensed attorney, accountant, or qualified government contracts professional regarding your specific circumstances. Federal Acquisition Regulation, Defense Federal Acquisition Regulation Supplement, and Defense Logistics Agency provisions discussed here reflect publicly available government guidance as of August 2026; regulations, thresholds, dollar limits, catalog records, and agency procedures are subject to change without notice — and federal acquisition is presently mid-transition on several fronts, including the Revolutionary FAR Overhaul, revised acquisition thresholds, and pending prohibitions on foreign-sourced semiconductors. Readers should verify current requirements against the live solicitation, the current catalog record, and current regulatory text before relying on any point here. Nothing in this booklet guarantees a contract award, source approval, catalog action, or any level of sales.
This booklet is about the National Stock Number (NSN) system: the federal catalog that identifies the items the government stocks, and the machinery that decides who is permitted to supply them.
You will hear the number called an NSN, or occasionally by the obsolete term Federal Stock Number. The first two are the same thing viewed from different sides of the alliance; the third was retired in 1974.
It is written for two readers. The first is a manufacturer who makes something the government uses and cannot work out why the business is going to somebody else. The second is a distributor or reseller trying to compete more effectively in a market that rewards specific behaviors and punishes others. Both readers need the same map, and each will draw different conclusions from it.
How to read this booklet. It is deliberately structured to let you stop early. Part 3 is a go/no-go analysis for manufacturers weighing direct sales against a channel strategy, and a meaningful number of readers should stop there and choose the channel deliberately rather than fighting a system whose economics do not fit them. Most published content on this topic is produced by firms that sell source approval or bid support services and therefore never presents that outcome seriously. We think it is the most valuable section here. Sections marked [ADVANCED] assume you already transact in this market; first-time readers can skip them on a first pass.
Part 1 — What a National Stock Number Actually Is
Thirteen digits, and each block means something
A National Stock Number is a thirteen-digit identifier formatted 1234-00-567-8901, defined at 41 CFR 101-30.101-3.
The first four digits are the Federal Supply Classification (FSC), sorting the item into a commodity class; the first two of those four are the Federal Supply Group (FSG), a broader family. The next two digits are the National Codification Bureau (NCB) code, identifying the country that cataloged the item, with the United States using 00 and 01. The final seven digits are the item identification number, assigned sequentially and carrying no meaning of their own.
The last nine digits together form the National Item Identification Number (NIIN). The NIIN is the part that uniquely identifies the item. The FSC in front of it is classification context and can be reassigned over time while the NIIN stays fixed. Build internal cross-reference tables on NIIN.
The NSN replaced the eleven-digit Federal Stock Number in 1974. Legacy references still surface in older drawings and technical manuals.
Who assigns it, and who does not
NSNs are assigned by DLA Logistics Information Services, the Defense Logistics Agency (DLA) organization at the Hart-Dole-Inouye Federal Center in Battle Creek, Michigan. It operates the United States National Codification Bureau, administers the Commercial and Government Entity (CAGE) code program, and maintains the master catalog.
Manufacturers and suppliers do not have the authority to request an NSN. The request originates inside the government. A military service logistics command determines that an item needs to be stocked, either during provisioning of a new weapon system or because a non-stocked item keeps being ordered, and forwards a cataloging request to DLA Logistics Information Services. DLA publishes the assignment process flow, and catalog changes move on the electronic DD Form 1685.
Anyone offering to sell you an NSN, or to file your NSN application, is selling something that does not exist. Part 5 covers the legitimate paths.
The catalog behind the number
NSNs live in the Federal Catalog System, whose master database is the Federal Logistics Information System (FLIS). FLIS holds records on more than sixteen million items, roughly 7.4 million of them active. Each record carries an Approved Item Name and Item Name Code (INC); characteristics data captured under a Federal Item Identification Guide (FIIG) using Master Requirement Codes (MRCs); reference and part numbers with their CAGE codes; and management data including unit of issue, shelf life, and the procurement codes covered in Part 4.
Access note. WebFLIS and FedLog now require Account Management and Provisioning System registration plus a Common Access Card or Personal Identity Verification credential, which most commercial vendors do not hold. PUB LOG remains publicly available through the FLIS electronic reading room. Build your research process around what you can actually reach.
One part number, zero or many stock numbers
A single manufacturer part number can map to several NSNs, because the same physical item may be cataloged separately for different applications or services. It can also map to none, because it was never cataloged. Neither is an error, and each implies a different entry strategy. If your part number already appears as a reference number on a record, you are further along than you think.
CAGE codes
A CAGE code is a five-character identifier tied to a specific company name at a specific physical location. Two facilities of one company get two codes. United States firms receive one automatically during SAM.gov registration; firms not registering in SAM can request one at cage.dla.mil. The requirement appears at FAR 52.204-16.
Foreign entities work in the opposite order, obtaining a NATO Commercial and Government Entity (NCAGE) code first through a national codification bureau or the NATO Support and Procurement Agency, then registering in SAM.gov. Reversing that sequence is the most common first-attempt failure for foreign suppliers.
CAGE matters because approved-source restrictions are written in CAGE codes. Your company is not approved; a specific CAGE at a specific address is. Part 4 shows why that distinction becomes expensive.
It is a NATO system
The NSN is the American instance of the NATO Stock Number. The NATO Codification System is used by every alliance member plus non-member participants including Japan, Australia, and New Zealand under standardization agreements, with countries participating either by running their own codification bureau or by being sponsored by one that does. A number assigned in one participating country is readable across the alliance, which carries real export implications. Part 7 opens that subject.
The sentence to hold onto
An NSN is a catalog number. It records that the government has decided to stock an item and describes what that item is. It says nothing about who may sell it, nothing about whether anyone is currently buying it, and nothing about whether you can compete for it. Those three questions have separate answers.
Part 2 — How the Government Buys It
The size of the market
Per the DLA FY2025 Annual Report, published January 2026:
- $55.8 billion in obligations across 3.9 million orders
- More than 11,000 awards per day, approximately 94% automated
- An 81% competition rate
- $22.6 billion to small business, about 23% of the entire Department of Defense small business obligations, and the thirteenth consecutive year DLA exceeded its goals
- Roughly 8,500 suppliers, about 80% of them small businesses
DLA supplies roughly 86% of the military's spare parts and close to 100% of its fuel, sustaining more than 24,000 weapon systems. One reporting wrinkle: the Director's message in the same document cites $55.4 billion in obligations and $51.8 billion in revenue. The figures measure different things; cite them carefully.
Where the buying happens
DLA's major subordinate commands run the commodity lanes: DLA Aviation (Richmond, Virginia), DLA Land and Maritime (Columbus, Ohio), DLA Troop Support (Philadelphia, Pennsylvania), plus DLA Energy, DLA Distribution, and DLA Disposition Services. Which command owns an item determines which quality and technical requirements attach.
The military services buy NSN items directly. Army, Navy through Naval Supply Systems Command, Air Force through Air Force Life Cycle Management Center, and Marine Corps all buy spares outside DLA, and weapon system program offices buy through their own sustainment contracts. Some of the largest parts spending in the department never touches DLA.
The General Services Administration (GSA) is a source for common NSN-coded items through GSA Global Supply, which stocks NSN and commercial part-numbered items and buys first from Multiple Award Schedule holders. If you already hold a Schedule, this is a live path most holders never work.
FedMall, launched in 2017 as the successor to DoD EMALL, is the storefront where buyers requisition NSN materiel, GSA assets, and commercial items in one place, with NSN orders routing to DLA or GSA Global Supply for fulfillment.
The machine: DIBBS
DLA solicitations post to the DLA Internet Bid Board System (DIBBS), which carries requests for quotation, requests for proposal, invitations for bid, and award history. Award history is the most underused free market research tool in defense contracting.
The critical distinction is automated versus manual. On an automated request for quotation, a fully compliant quote can be evaluated and awarded before the stated closing date, without human review. The ninth position of the solicitation number signals this: T or U indicates automated processing. Quoting an automated solicitation at the deadline means quoting into a buy that may already be gone.
How the machine scores you
Automated evaluation weighs price, delivery, and past performance. Past performance enters through the Automated Best Value System (ABVS), which scores delivery and quality history and feeds award decisions directly.
- Delivery days are a competitive lever. Shorter offered delivery can beat lower price. Manufacturers quoting factory lead time against distributors quoting from stock lose here routinely.
- Past performance compounds. Early on-time deliveries win later awards; early late deliveries do the reverse, durably.
- Unit of issue errors are fatal. Pricing per each against a solicitation asking per hundred is the most common self-inflicted loss in the system, and nobody will call to clarify.
The dollar lines that govern the lane
Effective October 1, 2025, under Federal Acquisition Circular 2025-06, the micro-purchase threshold rose from $10,000 to $15,000 and the simplified acquisition threshold from $250,000 to $350,000, set at FAR 2.101. A very large share of NSN buys falls beneath them. This is a market of many small transactions.
The registration stack
- SAM.gov registration, active, with a Unique Entity Identifier and CAGE code. Allow at least ten business days to activate; renew every 365 days.
- A DIBBS account, separate from SAM.
- Procurement Integrated Enterprise Environment (PIEE) for Wide Area Workflow invoicing. Set this up before award, not after.
- Joint Certification Program certification via DD Form 2345, required for access to militarily critical technical data through DIBBS cFolders.
Market research on yourself
DIBBS award history shows who won, at what unit price, in what quantity, and how often the item repeats. Repetition is the signal that matters: a part bought four times a year is a business; a part bought once in 2019 is not. USAspending and the Federal Procurement Data System give the broader picture, tagged by Product Service Code and North American Industry Classification System code rather than NSN, so map your FSC to those codes first. PUB LOG supplies the catalog data.
Part 3 — The Honest Go/No-Go: Direct, Channel, or Both
If you read one part of this booklet, read this one. A meaningful number of manufacturers should choose a channel strategy deliberately rather than fight a system whose economics do not fit them.
Start with the claim itself
The belief that the government will not buy direct from manufacturers is widespread. No primary government source publishes a clean agency-wide split of DLA spending between manufacturers and distributors. Anyone quoting a percentage is citing a specific program or inventing it.
What the evidence supports is narrower and more useful: distributors dominate the high-volume, small-dollar automated lane for structural reasons, while direct-from-manufacturer buying happens through entirely different contract types. Two different markets sharing one catalog.
Why the reseller wins the automated lane
- Speed. Automated solicitations can award before closing. A distributor quotes in minutes; a manufacturer routing through sales, engineering, and finance quotes in days.
- Stock position. Offered delivery is scored, and shipping from a shelf beats a production lead time.
- Order size. Quantities of six, eleven, or forty are routine, beneath most manufacturers' minimum order quantities and beneath the point where a line setup pays.
- Packaging and marking. Military packaging under MIL-STD-2073 and marking under MIL-STD-129, plus Item Unique Identification and radio frequency identification where applicable, are specialized work distributors have built as a service line.
- Administrative load. Registration maintenance, invoicing, Federal Acquisition Regulation and Defense Federal Acquisition Regulation Supplement flowdowns, possible Cost Accounting Standards exposure. Distributors amortize this across thousands of transactions.
- Accumulated past performance. ABVS rewards a history you can only build by transacting.
The Nonmanufacturer Rule
Under 13 CFR 121.406, a small business dealer may supply another firm's product on a set-aside contract if it meets the Nonmanufacturer Rule conditions, which normally require the end item be made by another small business unless the Small Business Administration (SBA) has granted a waiver. Below certain thresholds, limitations on subcontracting and the Nonmanufacturer Rule do not apply to some set-asides at all.
On small business set-aside NSN buys, a dealer is explicitly permitted to win with your product. That is the law functioning as designed.
The counter-evidence
DLA buys direct from manufacturers routinely, through different vehicles:
- Long-term contracts and corporate contracts consolidate many items over several years with one supplier.
- Strategic supplier alliances are long-term agreements with manufacturers, particularly for sole-source items. DLA Aviation's strategic acquisition function exists to manage relationships with sole-source original equipment manufacturers, and GAO-03-709 documented the construct.
- Prime vendor contracts run entire commodity categories through a single supplier. GAO-06-739R reported prime vendor sales of roughly $9 billion out of DLA's approximately $32 billion in sales in FY2005. Two decades old, offered only as order of magnitude.
If your goal is direct government business as a manufacturer, these are the targets. They are pursued through DLA's supplier and small business offices and the acquisition planning cycle, not by refreshing DIBBS.
[ADVANCED] The pricing politics you are operating inside
- TransDigm. DoD Inspector General report DODIG-2019-060 (February 27, 2019) found $16.1 million in excess profit on 46 parts sold to DLA and the Army for $26.2 million between January 2015 and January 2017, with profit rates from 17% to 4,451% against a 15% benchmark; the company refunded the amount. A December 2021 follow-on found at least $20.8 million in excess profit on 105 parts across 150 contracts, ranging 2.8% to 3,850.6%.
- C-17 sustainment. DODIG-2025-009 (October 25, 2024) found the Air Force did not pay fair and reasonable prices for 26% of parts examined, producing $992,856 in overpayments, including a lavatory soap dispenser at a 7,943% markup (roughly eighty times commercial cost, $149,072 overpaid), machine screws at 10,319%, and a pressure transmitter at 3,556%.
- Pass-through scrutiny. The Project On Government Oversight's Sidelining Small Businesses (June 24, 2022) examined DLA's Special Operational Equipment Tailored Logistics Support program, valued up to $33 billion over ten years through four small business intermediaries, documenting at least $339 million passed through in one year to the largest federal contractors, one intermediary's subawards amounting to 71.4% of its associated $476 million in prime awards, and an SBA letter of January 2022 stating DLA had misapplied a narrow waiver. DLA collects a standard 5.4% fee under the program.
- The counterweight. DLA's FY2025 reporting states an analysis found 94% of sampled spend in line with or better than commercial prices, delivering at least $6 billion in purchasing power. Aggregate performance can be sound while specific sole-source items are badly overpriced.
The practical read: pricing scrutiny is rising, and a defensible price direct from the factory is becoming a competitive asset.
When direct NSN sales are the wrong move
- Your minimum order quantity exceeds typical buy quantities. Catalog history shows tens; your line will not run under a thousand. Sell through someone who holds inventory.
- You cannot absorb packaging and marking. Build it, buy it as a service, or let a partner do it.
- Your items are locked to other approved sources. Part 4 applies. That is a project measured in quarters.
- You have real channel conflict. Selling direct means competing with your own dealers. A business decision, not a contracting one, and it should be made deliberately.
- Nobody owns the administrative tail. Registration, invoicing, delivery discipline feeding your past performance score, audit exposure.
What to do instead
- Enable a distributor deliberately rather than accidentally. If a reseller will win with your product anyway, structure the relationship so you capture manufacturing margin and gain visibility into government demand.
- Pursue long-term and corporate contracts where direct-manufacture economics work.
- Work the sustainment side. Program offices and engineering support activities decide who may supply an item at all.
- Use a GSA Schedule as a parallel path if your items are commercially available.
The five-question test
Pursue direct NSN sales only if all five are yes:
- The items show repeat buying history in DIBBS award data, not a single historical purchase.
- Typical quantities are compatible with your production economics.
- You can meet packaging, marking, and delivery requirements at those quantities, or price them in.
- You are an approved source already, or willing to fund an approval effort measured in quarters.
- Someone owns the administrative tail for the life of the relationship.
Part 4 — Who Is Allowed to Bid
Two codes, printed together
Every DLA spare parts solicitation carries an Acquisition Method Code (AMC), a single digit, paired with an Acquisition Method Suffix Code (AMSC), a letter, shown together as 1G or 3B. The suffix decides your fate:
- AMSC G — the government has adequate, unrestricted technical data. Full and open competition. Anyone qualified may quote.
- AMSC B — source controlled. The design activity controls which sources may supply.
- AMSC C — source restricted. Competition limited to approved sources.
- AMSC D — restricted to a specific CAGE code and part number. Effectively sole-source.
Additional letters exist, and their meanings vary across how different sources describe them. Treat letter-by-letter tables from consulting sites as directional; rely on the solicitation and DLA's Source Approval Request and Alternate Offer Guide for anything you are betting money on.
The operational rule. If coded G, quote it. If coded B, C, or D, quoting is pointless until you are an approved source, and neither quality nor price fixes that.
Why items get locked: technical data rights
Under DFARS 252.227-7013 for technical data and DFARS 252.227-7014 for noncommercial software, the government's rights follow the funding. Development exclusively at government expense produces unlimited rights. Development exclusively at private expense produces limited rights, usable internally but generally not releasable for competitive procurement. Mixed funding produces government purpose rights, converting to unlimited after five years.
When the government holds only limited rights, it has no releasable technical data package. It cannot describe the item well enough for a new manufacturer to build it, so it cannot break the item out for competition. That is the contractual consequence of who funded the design, often decades ago. GAO-21-388 documented the downstream effect on sole-source pricing, including award delays as long as 1,154 days.
For a manufacturer the implication cuts both ways. If you own the design, your data rights are a durable competitive position worth protecting deliberately. If you are entering someone else's item, missing data rights are the wall.
Getting added: the Source Approval Request
A Source Approval Request (SAR) is the package a prospective supplier submits to be added as an approved source on a restricted item. An Alternate Offer (AO) is the equivalent submitted against a specific active solicitation. Only other-than-full-and-open items are eligible; G-coded items need no package.
DLA defines four categories: Category I, you produced the actual item; Category II, you produced a similar item and argue the capability transfers; Category III, you are a new manufacturer holding the technical data; Category IV, you reverse engineered the item at your own expense.
Three facts from DLA's guidance that people underestimate:
- Review generally takes a minimum of 90 days and possibly 180 days or longer, because engineering support activity review sits behind it.
- Awards will not be delayed for a pending package. The buy you targeted goes to someone else while you wait.
- Approval grants the opportunity to compete, nothing more. DLA states plainly that becoming an approved source does not guarantee future contracts.
When the manufacturer is not an approved source for its own part
This sounds absurd and is common. The record names a CAGE code and part number. If your item historically reached the government through a distributor's CAGE, or under a different corporate entity, or the record predates your current facility, the approved source on file may not be you. Same factory, same part, wrong identifier. The fix is the same SAR process, usually Category I or III, and it converts you from a middleman's supplier into a competitor in your own right.
Qualification requirements
Separate from source approval, FAR Subpart 9.2 establishes qualification requirements satisfied before award: the Qualified Products List (QPL) for tested products, the Qualified Manufacturers List (QML) for qualified processes, and the Qualified Bidders List (QBL). DLA Troop Support also runs Qualified Suppliers Lists for Distributors and Manufacturers (QSLD and QSLM) in commodity areas such as industrial hardware. Listing is required to receive award and does not guarantee one.
[ADVANCED] Critical items and first article testing
Items designated Critical Application Items (CAI), Critical Safety Items (CSI), or Flight Safety Critical Aircraft Parts (FSCAP) carry heightened approval requirements, tighter documentation, and often recency requirements on prior production. Restricted and critical items frequently require First Article Testing (FAT) or production lot testing before deliveries are accepted, at your cost. Model it before you commit.
A realistic sequence
- Pull the catalog record and award history. Confirm repeat buying at quantities you can serve.
- Read the AMC and AMSC. G means quote. B, C, or D means continue.
- Determine which SAR category you can honestly support. Category II arguments fail regularly when similarity is asserted rather than demonstrated.
- Get Joint Certification Program certified via DD Form 2345 if you need militarily critical technical data.
- Submit, then keep quoting G-coded items while the review runs.
- Plan for first article testing on the first award.
Why packages get rejected
Incomplete documentation. Asserted rather than demonstrated similarity in Category II packages. Missing or inadequate quality system evidence. Reverse engineering documentation that does not establish form, fit, and function equivalence. And submissions against items already coded G that never needed a package.
Part 5 — When the Item Does Not Exist Yet
The uncomfortable starting point
Manufacturers and suppliers do not have the authority to request an NSN. A unit identifies a requirement, a service logistics command decides whether the item warrants stocking, and the command forwards a cataloging request to DLA Logistics Information Services. DLA also runs an item reduction and standardization program whose purpose is to shrink the catalog, not grow it. Every new NSN carries a permanent management cost, and novelty alone is not an argument for one.
The objective is therefore not to file something. It is to find a government activity that wants your item in the system and will initiate the request.
Check first whether you need a new number
- Your part may already be a reference number on an existing record, making this a source approval question. Part 4 applies.
- An alternate item can often be added to an existing NSN where your product is a form, fit, and function equivalent. Dramatically faster than a new catalog entry, and the single most overlooked option in this area.
- A Value Engineering Change Proposal under FAR Part 48 and DFARS Part 248 lets a contractor propose a cost-reducing change and share the savings. If you are already performing, this is a formal, funded mechanism.
The paths that work
Every one runs through a government sponsor.
- Provisioning. New items enter the catalog in bulk when a weapon system is fielded or significantly modified. Being designed in during that window means cataloging follows automatically. This is the highest-value moment to be in the room, and it happens years before anyone buys a spare.
- SBIR and STTR — non-dilutive funding, and more importantly a structured relationship with a program office. Phase III is where transition to production happens.
- Other Transaction Authority and Commercial Solutions Openings — flexible instruments for prototypes and follow-on production outside standard procedures.
- The Defense Innovation Unit — a purpose-built on-ramp for commercial technology, with a record of moving companies from prototype to production contract.
- DLA Research and Development and the DLA Small Business Office — DLA's own supplier engagement and technology insertion channels.
- Engineering support activities. The engineering activity owning an item or system holds the technical judgment that governs what may be substituted or added. Slower than any of the above, more durable than all of them.
What to sell through in the meantime
- FedMall allows vendors to list items for government purchase card buying without an NSN. Demonstrated FedMall demand is itself an argument for cataloging.
- Micro-purchases and simplified acquisition. At $15,000 and $350,000 respectively, agencies have substantial latitude to buy directly, and many first federal sales happen this way with no vehicle at all.
- A GSA Multiple Award Schedule, if your product is commercially available, with GSA Global Supply as a route into NSN-coded demand.
- Subcontracting to a prime, where the cataloging question may resolve downstream.
Realistic expectations
New item introduction is measured in years, and the determining variable is not product quality. It is whether a funded government activity has a requirement your item satisfies and will sponsor it. Companies treating this as a paperwork problem lose. Companies treating it as business development occasionally win big, because an item cataloged under your part number with your CAGE as approved source is among the most defensible positions available in this market.
Part 6 — Reference Figures
| Item | Figure |
|---|---|
| NSN length | 13 digits (FSC 4 + NCB 2 + item ID 7) |
| NIIN length | 9 digits (NCB 2 + item ID 7) |
| United States NCB codes | 00 and 01 |
| Items in FLIS | 16 million+ recorded, ~7.4 million active |
| DLA FY2025 obligations | $55.8 billion |
| DLA FY2025 orders | 3.9 million |
| DLA awards per day | 11,000+ |
| Share of DLA orders automated | ~94% |
| DLA competition rate | 81% |
| DLA FY2025 small business obligations | $22.6 billion (~23% of DoD total) |
| DLA supplier base | ~8,500, ~80% small business |
| Share of military spare parts from DLA | ~86% |
| Micro-purchase threshold | $15,000 (eff. Oct. 1, 2025) |
| Simplified acquisition threshold | $350,000 (eff. Oct. 1, 2025) |
| Source approval review time | Generally 90 days minimum, often 180+ |
| Government purpose rights duration | 5 years, then unlimited |
| SAM.gov activation / renewal | ~10 business days; renew every 365 days |
| Automated solicitation indicator | T or U in 9th position of solicitation number |
Sequence of work. Before spending anything: pick the items you believe you could supply, pull their DIBBS award history, and confirm repeat buying at quantities your economics support. Then read the AMC and AMSC on each. G-coded items: complete the registration stack (SAM.gov, DIBBS, PIEE, and Joint Certification Program if you need technical data) and begin quoting, treating delivery days as a competitive lever and guarding against unit-of-issue errors. B, C, or D-coded items: determine your source approval category honestly, assemble the package, submit, and keep quoting G items during a review that will run 90 to 180 days or longer. Items with no NSN: rule out reference-number and alternate-item paths first, then pursue a government sponsor through provisioning, SBIR/STTR, Other Transaction Authority, the Defense Innovation Unit, or DLA's supplier channels, selling through FedMall, micro-purchases, or a GSA Schedule meanwhile. Ongoing: protect your past performance score, because it compounds.
Part 7 — United States Versus Foreign Manufacturers
Compact treatment. Each side of this question is substantial enough to warrant its own full treatment, and both are forthcoming.
Registration runs in reverse. A foreign entity obtains an NCAGE code first, through its national codification bureau or the NATO Support and Procurement Agency, then registers in SAM.gov. Attempting the domestic sequence fails.
Trade Agreements Act. Products from non-designated countries are barred above the applicable threshold. China, Russia, and India are not designated countries, which eliminates a great many product lines outright.
Berry Amendment. 10 U.S.C. 4862, implemented at DFARS Subpart 225.70, requires domestic sourcing for food, clothing, textiles, and certain tools bought with Department of Defense funds. Specialty metals are governed separately at 10 U.S.C. 4863 and DFARS 252.225-7008 and 252.225-7009.
Section 889 and Section 5949. Section 889 prohibits certain Chinese telecommunications and video surveillance equipment. Section 5949 of the FY2023 National Defense Authorization Act prohibits certain Chinese-origin semiconductors, with a statutory effective date of December 23, 2027; a proposed implementing rule published February 17, 2026 with comments closed April 20, 2026 was not final as of mid-2026.
Export control and ownership. International Traffic in Arms Regulations and Export Administration Regulations obligations, and Foreign Ownership, Control or Influence considerations, constrain what a foreign-owned supplier can do in defense parts.
Qualifying countries. DFARS Subpart 225.8 provides relief for allied countries with reciprocal defense procurement memoranda of understanding.
Part 8 — What Is in Flux (as of August 2026)
1. The Revolutionary FAR Overhaul. Launched under Executive Order 14275 in April 2025, the overhaul produced model deviation text agencies adopted as class deviations while formal rulemaking proceeds. Proposed rules published in the Federal Register June 23, 2026, comments due July 23, 2026. Parts 8, 12, 13, and 15, governing the simplified and commercial acquisition procedures most NSN buys run under, are in scope. For a given solicitation you may need to determine whether deviation text or codified FAR governs.
2. Acquisition thresholds. Micro-purchase at $15,000 and simplified acquisition at $350,000, effective October 1, 2025. Older guidance produces wrong competitive analysis at the margins.
3. Procurement consolidation. Executive Order 14240 designates GSA as executive agent for governmentwide acquisition of common goods and services, which may shift common NSN-coded items toward GSA channels.
4. Section 5949 implementation. Proposed rule February 17, 2026, comments closed April 20, 2026, not final as of mid-2026. Semiconductor provenance documentation is coming; firms with deep supply chains should start mapping now.
5. Catalog access. WebFLIS and FedLog now require credentialed access; PUB LOG remains publicly reachable. Build research processes around what you can reach.
6. Pricing scrutiny. Inspector General findings on sole-source and intermediary pricing continue to shape contracting officer behavior. Documented, defensible pricing is a competitive asset.
A caution on data. Several widely circulated figures in this space are inconsistent or dated. DLA's own reports carry slightly different automation percentages and obligation figures across documents and years; the prime vendor share figure is from FY2005; and detailed AMSC letter tables beyond G, B, C, and D come largely from consulting sources rather than primary DLA text. Verify anything you are betting on.
Closing
The National Stock Number system is neither the gatekeeper it is described as nor the open market it appears to be from the outside. It is a catalog, and catalogs record decisions that were made elsewhere: what to stock, who may supply it, and what data the government owns about it.
Almost every failure in this market traces to a company answering the wrong question. “How do I get an NSN” is the wrong question, because you cannot. “Why won't they buy direct from me” is the wrong question, because on the automated small-dollar lane the answer is structural rather than personal. “How do I win this solicitation” is the wrong question when the acquisition method suffix code already says you may not bid.
The right questions are narrower and answerable in an afternoon. Is this item bought repeatedly, at quantities I can serve? Am I permitted to bid on it? If not, what would it take, and is that worth funding? And if it does not exist in the catalog at all, who inside the government would want it to?
Fifty-five billion dollars a year moves through one agency alone. The gap between that number and the revenue most individual suppliers see is not a mystery. It is the predictable result of a catalog that records permission being mistaken for one that confers demand.
Sources
Catalog system and identifiers
- Code of Federal Regulations, Title 41, Section 101-30.101-3, National Stock Number — law.cornell.edu
- Defense Logistics Agency, Information Operations — dla.mil
- Defense Logistics Agency, WebFLIS (Federal Logistics Information System Web Inquiry) — dla.mil
- Defense Logistics Agency, National Stock Number Assignment Process Flow — defense.gov
- Defense Logistics Agency, DD Form 1685, Federal and International Cataloging — dla.mil
- Federal Acquisition Regulation 52.204-16, Commercial and Government Entity Code Reporting — acquisition.gov
- Defense Logistics Agency, Commercial and Government Entity Code Program — cage.dla.mil
- System for Award Management, Entity Registration — sam.gov
Buying systems and procedures
- Defense Logistics Agency, Annual Report (Fiscal Year 2025, published January 2026) — dla.mil
- Defense Logistics Agency, DLA Internet Bid Board System — dibbs.bsm.dla.mil
- Defense Logistics Agency, Procurement Systems and Supplier Interface (Automated Best Value System overview) — ndia.dtic.mil
- General Services Administration, Doing Business with GSA Global Supply — gsa.gov
- Office of the Under Secretary of Defense for Acquisition and Sustainment, FedMall Today — acq.osd.mil
- Defense Logistics Agency, Joint Certification Program (DD Form 2345) — dla.mil
- Procurement Integrated Enterprise Environment — piee.eb.mil
- Federal Register, Federal Acquisition Regulation: Federal Acquisition Circular 2025-06 (acquisition threshold increases, August 27, 2025) — federalregister.gov
- Federal Acquisition Regulation Part 2, Definitions of Words and Terms — acquisition.gov
Source approval, qualification, and data rights
- Defense Logistics Agency, Source Approval Request and Alternate Offer Guide — dla.mil
- Defense Federal Acquisition Regulation Supplement 252.227-7013, Rights in Technical Data — Noncommercial Items — ecfr.gov
- Defense Federal Acquisition Regulation Supplement 252.227-7014, Rights in Noncommercial Computer Software and Noncommercial Computer Software Documentation — acquisition.gov
- Federal Acquisition Regulation Subpart 9.2, Qualifications Requirements — acquisition.gov
- Defense Logistics Agency Troop Support, Qualified Suppliers List for Distributors (example commodity listing) — dla.mil
Oversight, pricing, and the manufacturer-distributor question
- Code of Federal Regulations, Title 13, Section 121.406, Nonmanufacturer Rule — ecfr.gov
- Defense Logistics Agency Aviation, Strategic Acquisition — dla.mil
- Government Accountability Office, GAO-03-709, Defense Inventory: Several Actions Are Needed to Further DLA's Efforts to Mitigate Shortages of Critical Parts — gao.gov
- Government Accountability Office, GAO-06-739R, Defense Management: Attention Is Needed to Improve Oversight of DLA Prime Vendor Program — govinfo.gov
- Government Accountability Office, GAO-21-388, DoD Should Improve Its Use of Data to Negotiate Sole-Source Spare Parts Prices — gao.gov
- Department of Defense Office of Inspector General, Report DODIG-2025-009, Audit of Spare Parts Pricing Under the C-17 Globemaster III Sustainment Contract (October 25, 2024) — defense.gov
- Department of Defense Office of Inspector General, Reports and Publications (TransDigm excess profit reports, 2019 and 2021) — dodig.mil
- Project On Government Oversight, Sidelining Small Businesses (June 24, 2022) — pogo.org
New item introduction and innovation pathways
- Federal Acquisition Regulation Part 48, Value Engineering — acquisition.gov
- Small Business Innovation Research and Small Business Technology Transfer programs — sbir.gov
- Defense Innovation Unit — diu.mil
- Defense Logistics Agency, Small Business Programs — dla.mil
- General Services Administration, Multiple Award Schedule — gsa.gov
Domestic sourcing, foreign suppliers, and current policy
- United States Code, Title 10, Section 4862, Berry Amendment — law.cornell.edu
- Defense Federal Acquisition Regulation Supplement 252.225-7008, Restriction on Acquisition of Specialty Metals — acquisition.gov
- Defense Federal Acquisition Regulation Supplement Subpart 225.8, Other International Agreements and Coordination (qualifying countries) — acquisition.gov
- Executive Order 14275, Restoring Common Sense to Federal Procurement (April 2025) — federalregister.gov
- Executive Order 14240, Eliminating Waste and Saving Taxpayer Dollars by Consolidating Procurement (March 20, 2025) — federalregister.gov
- Acquisition.gov, Revolutionary FAR Overhaul — acquisition.gov
- USAspending.gov, Federal award and spending data — usaspending.gov
- Federal Procurement Data System — fpds.gov
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