A NATO Stock Number, or National Stock Number (NSN) as it is known in the US, is a 13-digit numeric

code In communications and information processing, code is a system of rules to convert information—such as a letter, word, sound, image, or gesture—into another form, sometimes shortened or secret, for communication through a communicati ...

used by the

NATO The North Atlantic Treaty Organization (NATO, ; french: Organisation du traité de l'Atlantique nord, ), also called the North Atlantic Alliance, is an intergovernmental military alliance between 30 member states – 28 European and two N ...

military alliance, identifying all the 'standardized material items of supply' as they have been recognized by all

member states of NATO NATO (North Atlantic Treaty Organization) is an international military alliance that consists of 30 member states from Europe and North America. It was established at the signing of the North Atlantic Treaty on 4 April 1949. Article 5 of t ...

. Pursuant to the NATO Standardization Agreements, the NSN has come to be used in all treaty countries. However, many countries that use the NSN program are not members of NATO (e.g. Japan, Australia and New Zealand). A two-digit Material Management Aggregation Code (MMAC) suffix may also be appended, to denote asset end use but it is not considered part of the NSN. In the United Kingdom it is known as a Domestic Management Code (DMC). An item having an NSN is said to be "stock-listed".

Structure

The NATO Stock Number consists of the NATO Supply Class (NSC or FSC) and the National Item Identification Number (NIIN). However the NIIN alone uniquely identifies the item, the FSC merely adds context by indicating the general classification of the item. The format of an NSN might be described as follows: abcd-ef-ghi-jklm Each element, ''a'' through ''m'', was originally intended to be a single

decimal The decimal numeral system (also called the base-ten positional numeral system and denary or decanary) is the standard system for denoting integer and non-integer numbers. It is the extension to non-integer numbers of the Hindu–Arabic numeral ...

digit. As inventories grew in complexity, element ''g'' became

alphanumeric Alphanumericals or alphanumeric characters are a combination of alphabetical and numerical characters. More specifically, they are the collection of Latin letters and Arabic digits. An alphanumeric code is an identifier made of alphanumeric c ...

, beginning with uppercase ''A'' for certain newly added items. By 2000, uppercase ''C'' was in use.

Federal Supply Classification Group (FSCG)

The initial subgroup, ''abcd'', is the Federal Supply Classification Group (FSCG) or National Supply Classification Group (NSCG). In theory, similar items would always have closely related numbers in this section of the NSN, no matter how the section is referred to. As the number of items has steadily increased and the system has become more complicated, it has not always been possible to keep similarity in numbers when the items are similar.

National Item Identification Number (NIIN)

The nine digits, ''ef-ghi-jklm'', comprise the NIIN (National Item Identification Number). This format improves readability but is optional as NIINs are often listed without hyphens. The first two digits of the NIIN (the ''ef'' pair) are used to record which country was the first to codify the item—which one first recognized it as an important item of supply. This is generally the

country of origin Country of origin (CO) represents the country or countries of manufacture, production, design, or brand origin where an article or product comes from. For multinational brands, CO may include multiple countries within the value-creation process ...

, meaning the country of final manufacture. The formal name of the field is CC for Country Code or NCB, because NCB also stands for

National Codification Bureau The National Codification Bureaus or NATO Codification Bureaux (NCB) are a NATO organization that oversees the management of the NATO Codification System (NCS). It is governed by NATO Allied Committee 135 (AC/135), with each member nation's National ...

. The NCB is the organisation, typically a government agency, in charge of maintaining the NCS database within a given country. The other seven characters are a non-significant identification code. Following are the NCB codes: As the list shows, users of the NCS system not only include the 29 NATO member countries, but the 34 NATO-sponsored countries as well. It is also grouped into tiers indicating participation and access. :Tier 1 Nations (Algeria, Bosnia-Herzegovina, Brunei Darussalam, Chile, Colombia, Egypt, Georgia, Oman, Pakistan, Peru, Qatar, Saudi Arabia, South Africa, Thailand) Nation has access to unclassified NSN data. There is a one-way data exchange and it does not participate in technical NCS management. :Tier 2 Nations (Argentina, Australia, Austria, Brazil, Columbia, Finland, India, Indonesia, Israel, Japan, Jordan, Republic of Korea, Malaysia, Morocco, New Zealand, Serbia, Singapore, Sweden, Ukraine, United Arab Emirates) Nation has a codification system that has been certified as fully NCS compliant. There is a two-way data exchange and participation in technical NCS management. :Tier 3 Nations (Albania, Belgium, Bulgaria, Canada, Croatia, Czech Republic, Denmark, Estonia, France, Germany, Greece, Hungary, Iceland, Italy, Latvia, Lithuania, Luxembourg, Montenegro, Netherlands, Republic of North Macedonia, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Turkey, the United Kingdom, and the United States): Nation is a NATO member and has a full membership in the NATO Codification Bureau (NCB). :Other Nations (''Afghanistan'', Belarus, ''Fiji'',

Ireland Ireland ( ; ga, Éire ; Ulster-Scots: ) is an island in the North Atlantic Ocean, in north-western Europe. It is separated from Great Britain to its east by the North Channel, the Irish Sea, and St George's Channel. Ireland is the s ...

, ''Kuwait'', Pakistan, Papua New Guinea, The Philippines, ''Tonga'',

Trinidad & Tobago Trinidad and Tobago (, ), officially the Republic of Trinidad and Tobago, is the southernmost island country in the Caribbean. Consisting of the main islands Trinidad and Tobago, and numerous much smaller islands, it is situated south of Gr ...

). Belarus (62), Kuwait (60), Papua New Guinea (65) and the Philippines (46) have NCB codes but are not currently in the 1st Tier. Afghanistan (67), Fiji (48) and Tonga (49) are not currently in Tier 1 and their NCB codes are no longer listed. Ireland and Trinidad & Tobago are neither in Tier 1 nor do they have assigned NCB code numbers. Ireland, Kuwait, Papua New Guinea, and Trinidad & Tobago maintain connections to the NCB through a liaison office. The first countries to receive NCB code numbers were the United Kingdom (99), Australia (66), and New Zealand (98)—as they had already been involved in the program. NATO was assigned the NCB code (11) for its items as it was the next number available after the 00 to 10 block set aside for the United States' own use. Canada received (20) and (21) because it was already supplying items for the United States and the Commonwealth before the system was in place; 20 was for old and current items of supply and 21 was for new items. The NCB code (69) was issued but has been discontinued; it might have belonged to former partners Taiwan, Iran or Iraq. Iceland (24) and Luxembourg (28) are assigned NCB codes of their own but do not use them. All of Luxembourg's transactions are catalogued by Belgium (13) and Iceland uses other nations' NSNs when they make or order any stock items.

Related Terms

Department of Defense Identification Code (DODIC)

DODIC is an alphanumeric four-symbol code which is used to identify ammunition and explosives (FSG 13 and 14). A DODIC consists of either one letter followed by three numerals (for example, A123) or two letters followed by two numerals (for example, AB12). (The numeral "Zero" (0) and the letter "O" (O) are considered the numeral "0" in the alphanumeric system to reduce confusion.) This code is shown either after the NSN or on the line underneath it on the container. The DODIC identifies the item, while the NSN identifies what type of item it is and how it is packaged and contained. Sometimes the DODIC also contains a two-numeral NCB code prefix for the manufacturer's or repacker's country if it is different from the packager's country. *A059 is the DODIC code for 5.56mm NATO M855 Ball type ammunition. The DODIC code also indicates that it is packed in 10-round stripper clips, 3 clips per cardboard spacer (3 clips / 30 rounds), and 4 spacers packed in a 4-pocket M8 bandoleer (one 3-clip spacer per pocket / 120 rounds per bandoleer). There are seven M8 bandoleers packed per recloseable metal M2A1 ammo can (840 rounds per can) and there are two M2A1 ammo cans per wire-bound plywood crate (1680 rounds per crate). *Bulgaria has the NCB code number 50. **Therefore, the DODIC code 50-A059 designates Bulgarian-manufactured 5.56mm NATO ammunition equivalent to 5.56mm NATO M855 Ball and packed in 10-round clips in M8 bandoleers.

Department of Defense Ammunition Code (DODAC)

The DODAC includes the 4-digit NSC of the ammunition and the 4-symbol DODIC. This is used in calculating ammunition transactions to reduce errors. It is notated on DD Form 581, DA Form 3151-R, and most ammunition reports. *1305 is the NSC for Ammunition Through 30mm. *A059 is the DODIC code for 5.56mm NATO M855 Ball type ammunition loaded in 10-round clips and packed in M8 Bandoleers. *1305-A059 is the DODAC code for a transaction involving a batch, lot, or amount of 5.56mm NATO M855 Ball ammunition packed in clips in bandoleers.

Local Stock Number (LSN)

A ''Local Stock Number'' is an experimental, substitute, or limited issue item. Its NCB code is replaced by "LL" and the first three characters of its item number are "L99". For instance, the experimental 5.56x45mm NSWC Crane '' Close Quarters Battle Receiver'' was originally codified as 1005-LL-L99-5996. When the weapon was no longer experimental and was codified as the ''Mk 18 MOD 0 Close Quarters Battle Rifle'', the upper receiver received the NSN of 1005-01-498-1913.

Line Item Number (LIN)

A six-position alphanumeric code assigned by the Army Materiel Command that identifies the generic nomenclature of specific types of equipment. Standard LINs consist of one alphabetic character followed by five numeric characters. SUBLINs (SUBstitute LINs) are equivalent LIN items that can be used in the place of Primary LINs. The Department of Defense uses LINs and SUBLINs when drawing up contracts with vendors or planning budgets.

NATO Symbols

*A container marked with a "square cross" in a circle ⊕ means the item is made exactly to NATO standards and specifications. Crossed circle

*A container marked with a rounded "Cross pattée" means it is a substitute item that is compatible and acceptable by NATO standards. Cross-Pattee-Alisee

*A solid circle • indicates Ball Ammunition. *An empty circle made with four dashed lines ◌ indicates Blank Ammunition. *A horizontal Rectangle — represents Tracer Ammunition. *A point-up Triangle represents Armor-Piercing Ammunition. *A large horizontal rectangle with 5 triangles along the top (like a picket fence) indicates an ammunition charger / stripper clip. The number to the right indicates how many rounds it contains. Sometimes the Charger / Clip model designation is listed to the far right (e.g. MK 3 CGR for the 7.62mm Mark 3 Charger). **On old ammo containers, an oval surrounding two 4-dot lines represented an 8-round en-bloc charger. A narrow rectangle through the base of 5 cartridge shapes indicated a 5-round Stripper Clip. *A large horizontal rectangle with a voided triangle from its base represents a bandoleer. The number to the right indicates how many rounds it holds. Sometimes the bandoleer model designation is listed to the far right (e.g., M2 BDR for the 7.62mm M2 bandoleer). *A horizontal straight line through two circles indicates linked ammunition. The alphanumeric code after it indicates the type of links used (e.g., M27 for 5.56mm M27 links). **Early US Military ammunition boxes were marked with vertical rectangles or cartridge shapes lll instead. When the symbol was straight it indicated .30 ammunition and when the symbol was angled it indicated .50 ammunition. The Lot number was also marked with a "B" suffix for cloth belts or L for metal link belts.

Lot Number

The Lot Number is used for quality control. If a batch is faulty or defective, the Lot Number can be used to track down who made it, where it was made, and when it was made. The Lot Number consists of the 1, 2, or 3-letter manufacturer's code, the two-numeral year of manufacture, the letter code - A (January) through M (December) - indicating the month, an interfix (or "batch") code that consists of 1 or more numerals, and the serial number (indicating the sequence the lot is in the batch). If the batch is disrupted for any reason (machinery overhaul or repair, product improvements initiated, or a new batch of components used in assembly) an alphabetic letter code is added at the end.

Example: Amalgamated Bio-Carbon (manufacturer code ABC) makes a batch of 40mm grenade shells in January, 2000. The batch's interfix number is 1 and its serial number is 234. The Lot Number would therefore be ABC-00-A-1-234. If part of the batch was manufactured on a different or overhauled assembly line, it would receive the Lot Number ABC-00-A-1-234A.

If the lot is made up of salvaged ammunition, it must be from the same Lot. If different ammunition types are mixed (as when ball and tracer ammunition are linked into a machinegun belt) and they originally had separate lot numbers, they must have all the ammunition lot numbers marked on the packaging. The repacker also has to put their manufacturer or military depot code and the two-digit year it was repacked on the packaging as well.

History

The NSN is an expanded version of the older

Federal Stock Number The Federal Stock Number (FSN) was the codification system used by the U.S. federal government from 1955 to 1974. It was 11 digits long. The first four digits were the Federal Supply Classification Group (FSCG) code. This relates the item to the ...

(FSN), which lacked the national-origin code labeled ''ef'' above, in the second subgroup. Items predating 1974 in warehouses are frequently stenciled with FSNs. As of 1998, the system is principally administered by the

Defense Logistics Agency The Defense Logistics Agency (DLA) is a combat support agency in the United States Department of Defense (DoD), with more than 26,000 civilian and military personnel throughout the world. Located in 48 states and 28 countries, DLA provides su ...

within the

U.S. Department of Defense The United States Department of Defense (DoD, USDOD or DOD) is an executive branch department of the federal government charged with coordinating and supervising all agencies and functions of the government directly related to national secur ...

. Other stock numbering systems are in use within the US DoD, but as of 2005, the NSN remained the most common and least ambiguous way to identify most standardized items of supply.

Federal Stock Number

A Federal Stock Number (FSN) was an 11-digit numeric

. It was first used by the Defense Munitions Board's Cataloging Agency in 1949 to identify items in the Joint Army-Navy Catalog System. On July 7, 1952 Public Law 82-436 (''Defense Cataloging and Standardization Act'') was passed by the second session of the 82nd Congress. It authorized the FSN to replace the

Ammunition Identification Code Ammunition (informally ammo) is the material fired, scattered, dropped, or detonated from any weapon or weapon system. Ammunition is both expendable weapons (e.g., bombs, missiles, grenades, land mines) and the component parts of other weapo ...

(AIC) and

Ordnance Stock Number Ordnance may refer to: Military and defense * Materiel in military logistics, including weapons, ammunition, vehicles, and maintenance tools and equipment. **The military branch responsible for supplying and developing these items, e.g., the Uni ...

(OSN). The Federal Stock Number was used officially from 1953 to 1974, when it was replaced by the National Stock Number. The conversion from FSN to NSN was typically done by adding "00" between the first set of numbers (the Federal Supply Class, or FSC) and the second set of numbers. For example, the FSN:

NIIN / NSN Catalogs

NIIN / NSN Catalogs include a significant number of items directly associated with military equipment in general, as well as items of a more generic use. These include Electronic Components, Medical Equipment, Office Furniture, Food items, Clothing, Industrial goods (pumps, valves, motors ...) and all kinds of Fasteners (bolts, nails, rivets ...), to name a few. For this reason, catalogs have a broader appeal, beyond their original audience (Defense agencies and their direct contractors.) The US Catalog covers on the order of 6 Million NIINs (Items of Supply) for a total of 13 Million Items of Production (Part Number + Manufacturer reference). The NATO Support and Procurement Agency (Capellen, Luxembourg) compiles on a regular basis the catalogs of several member nations, for the production of the ''NATO Master Catalogue of References for Logistics'' (NMCRL). This combined catalog, totaling 16 Million NIINs for approximately 32 Million Parts, is then published on DVD. Several companies or governmental agencies publish NIIN Catalogs online or on other media. These catalogs vary greatly in term of the completeness of the information as some items and/or some segments of information may be excluded, for SASecurity reasons or simply for lack of interest by the target audience. The distribution of these catalogs vary also in terms of the subscription cost and access or export restrictions. Some merely provide a "Part Number" lookup, while others offer advanced features such as parametric search (Search of items driven by the technical characteristics such as physical dimensions, material, color etc.) or links to associated data set. The data behind NIIN Catalogs is constantly updated & maintained by DoD's Defense Logistics personnel and cataloging information changes often. Some NIIN Catalogs on the market are built for regular updates to its database. Other catalogs present the same data, not kept updated with the current government requirements. For example, one commonly changed item requirement is freight and packaging (number of items per pallets, stacking height, etc.). Additionally, it is important to periodically verify that manufacturer part numbers stay associated with the National Stock Numbers they've been approved for.

Fictionalized NSNs

It is not unheard of for certain numbers to be referred to in works of fiction as if they were NSNs—especially in

military science fiction Military science fiction is a subgenre of science fiction that features the use of science fiction technology, mainly weapons, for military purposes and usually principal characters who are members of a military organization involved in military a ...

. This can be seen as a variation on the

false document A false document is a technique by which an author aims to increase verisimilitude in a work of fiction by inventing and inserting or mentioning documents that appear to be factual. The goal of a false document is to convince an audience that what ...

technique, something used creatively in order to lend an air of authenticity. *The M41A Pulse Rifle, from the movie ''Aliens'', has been referred to as having NSN 3055-00-721-4790, as if it were real (though its FSG is incorrect: 30 is ''Mechanical Power Transmission Equipment'', while 10, ''Weapons'', is probably the right FSG). *The spacecraft hull repair kit that the player must use in the sci-fi

computer game Video games, also known as computer games, are electronic games that involves interaction with a user interface or input device such as a joystick, controller, keyboard, or motion sensing device to generate visual feedback. This feedback ...

'' Mission Critical'', to stop the decompression emergency, has "NSN 5920-385-19468" stenciled on the side of its plastic box.

Notes

References

{{Reflist, refs= {{cite web , title=AFMAN 23-110 Volume 2 Part 2 Chapter 3 , url=http://www.e-publishing.af.mil/shared/media/epubs/PUBS/AF/23/23011002/020203/020203.pdf , access-date=February 21, 2008 , url-status=dead , archive-url=https://web.archive.org/web/20090704180412/http://www.e-publishing.af.mil/shared/media/epubs/PUBS/AF/23/23011002/020203/020203.pdf , archive-date=July 4, 2009 {{cite news, last=Testorides, first=Konstantin, date=12 February 2019, title=Call me by my new name: Balkan nation is North Macedonia now, publisher=Associated Press, url=https://www.apnews.com/882d70bca9844e2698bade5f90655958, access-date=30 June 2022 , archive-url=https://web.archive.org/web/20220422132422/https://apnews.com/article/882d70bca9844e2698bade5f90655958 , archive-date=22 April 2022 {{cite web , title=Statement by NATO Foreign Ministers on Afghanistan , url=https://www.nato.int/cps/en/natohq/official_texts_186086.htm , website=NATO , access-date=1 July 2022 , archive-url=https://web.archive.org/web/20220527094622/https://www.nato.int/cps/en/natohq/official_texts_186086.htm , archive-date=27 May 2022 , location=Brussels , date=20 August 2021 {{cite web , title=Statement by NATO Foreign Ministers , url=https://www.nato.int/cps/en/natohq/news_108501.htm , website=NATO , access-date=1 July 2022 , archive-url=https://web.archive.org/web/20220616101748/https://www.nato.int/cps/en/natohq/news_108501.htm , archive-date=16 June 2022 , date=1 April 2014 {{cite web , title=NATO Stock Numbers , url=https://www.nsnlookup.com/nato/nato-stock-numbers , website=NSN Lookup , archive-url=https://web.archive.org/web/20220604130724/https://www.nsnlookup.com/nato/nato-stock-numbers , archive-date=4 June 2022 {{cite web , author=Group of National Directors on Codification , url=https://www.nato.int/structur/AC/135/faq/faq-e.htm , title= Group of National Directors on Codification AC/135 - FAQ: Frequently Asked Questions - 1. What is a NATO Stock Number (NSN)? , access-date=30 June 2022 , archive-url=https://web.archive.org/web/20220619000320/https://www.nato.int/structur/AC/135/faq/faq-e.htm , archive-date=19 June 2022 Tier 1 Nations (c.2022)
/ref>
/ref>
/ref> {{Cite web , url=https://www.nato.int/structur/AC/135/main/pdf/NCS_codes_chart.pdf, title=NATO Codification System – NCS the Global Language of Logistics, date=February 2022, website=NATO , archive-url=https://web.archive.org/web/20220529220508/https://www.nato.int/structur/AC/135/main/pdf/NCS_codes_chart.pdf , archive-date=29 May 2022
/ref> {{cite web , title=Department of the Army Pamphlet 708–1 Cataloging of Supplies and Equipment Army Enterprise Nonstandard Material and Nonstandard Line Item Number Processes , url=https://armypubs.army.mil/epubs/DR_pubs/DR_a/pdf/web/ARN19765_P708_1_FINAL.pdf , website=Army Publishing Directorate , access-date=30 June 2022 , archive-url=https://web.archive.org/web/20211222174838/https://armypubs.army.mil/epubs/DR_pubs/DR_a/pdf/web/ARN19765_P708_1_FINAL.pdf , archive-date=22 December 2021 , date=11 March 2020 {{cite web , last1=Baena , first1=Derrick A , title=Derrick Baena Productions , url=http://www.alienscollection.com/derrick.html , website=Aliens Collection , access-date=30 June 2022 , archive-url=https://web.archive.org/web/20220315093533/http://www.alienscollection.com/derrick.html , archive-date=15 March 2022{{Unreliable source?, date=June 2022

External links

NSN Lookup
(Access to WebFLIS and NATO data (NSN, NIIN, CAGE, Part Number))
NationalStockNumber.info
(A replacement for defunct WebFLIS search engines)
WebFLIS Public Search

Niinja
(Public API access to WebFLIS data (NSN, NIIN, CAGE))

What Is a National Stock Number?Archived

FEDLOG Search
United States Department of Defense Military logistics of the United States Identifiers NATO standardisation