The NATO Item Identification Number or National Item Identification Number (NIIN) is a 9-digit alphanumeric code created by the NATO Codification Bureaux to designate unique items of supply.
The NATO Stock Number or National Stock Number (NSN) is a 13-digit alphanumeric code consisting of a Group of Supply, a Class of Supply and the unique NIIN to designate unique items of supply grouped by their relative catalog category.
The first four digits are the NATO Supply Classification (NSC) or Federal Supply Class (FSC) code. The first two digits are the NATO Supply Group (NSG) or Federal Supply Group (FSG).
Examples:
Group 10: Weapons 1005: Weapons (from 1 mm through 30 mm). 1010: Weapons (from 31 mm to 75 mm). 1015: Weapons (from 76 mm to 125 mm). 1020: Weapons (from 126 mm to 150 mm). 1025: Weapons (from 151 mm to 300 mm). 1030: Weapons (from 300 mm+). 1040: Chemical Weapons and Equipment. 1045: Launchers, Torpedo and Depth Charge 1055: Launchers, Rocket and Pyrotechnic 1070: Nets and Booms, Ordnance 1075: Degaussing and Mine Sweeping Equipment 1080: Camouflage and Deception Equipment 1090: Assemblies Interchangeable Between Weapons in Two or More Classes
Group 11: Nuclear Ordnance 1105: Nuclear Bombs 1110: Nuclear Projectiles 1115: Nuclear Warheads and Warhead Sections 1120: Nuclear Depth Charges 1125: Nuclear Demolition Charges 1127: Nuclear Rockets 1130: Conversion Kits, Nuclear Ordnance 1135: Fusing and Firing Devices, Nuclear Ordnance 1140: Nuclear Components 1145: Explosive and Pyrotechnic Components, Nuclear Ordnance 1190: Specialized Test and Handling Equipment, Nuclear Ordnance 1195: Miscellaneous Nuclear Ordnance
Group 12: Fire Control Equipment 1210: Fire Control Directors 1220: Fire Control Computing Sights and Devices 1230: Fire Control Systems, Complete 1240: Optical Sighting and Ranging Equipment 1250: Fire Control Stabilizing Mechanisms 1260: Fire Control Designating and Indicating Equipment 1265: Fire Control Transmitting and Receiving Equipment, except Airborne 1270: Aircraft Gunnery Fire Control Components 1280: Aircraft Bombing Fire Control Components 1285: Fire Control Radar Equipment, except Airborne 1287: Fire Control Sonar Equipment 1290: Miscellaneous Fire Control Equipment
Group 13: Ammunition and Explosives 1305: Ammunition, through 30mm (1mm - 30mm) 1310: Ammunition, over 30mm through 75mm (31mm-75mm) 1315: Ammunition, over 75mm through 125mm (76mm - 125mm) 1320: Ammunition, over 125mm (126mm +) 1325: Bombs 1330: Grenades 1336: Guided Missile Warheads and Explosive Components 1337: Guided Missile and Space Vehicle Explosive Propulsion Units, Solid Fuel; and Components 1338: Guided Missile and Space Vehicle Inert Propulsion Units, Solid Fuel; and Components. 1340: Rockets, Rocket Ammunition and Rocket Components 1345: Land Mines 1350: Underwater Mine and Components, Inert 1351: Underwater Mines and Components, Explosive 1352: Underwater Mine Disposal Inert Devices 1353: Underwater Mine Disposal Explosive Devices 1355: Torpedoes and Components, Inert 1356: Torpedoes and Components, Explosive 1360: Depth Charges and Components, Inert 1361: Depth Charges and Components, Explosive 1365: Military Chemical Agents 1370: Pyrotechnics 1375: Demolition Materials 1376: Bulk Explosives 1377: Cartridge and Propellant Actuated Devices and Components 1385: Surface Use Explosive Ordnance Disposal Tools and Equipment 1386: Underwater Use Explosive Ordnance Disposal and Swimmer Weapons Systems Tools and Equipment 1390: Fuzes and Primers 1395: Miscellaneous Ammunition 1398: Specialized Ammunition Handling and Servicing Equipment
Group 14: Guided Missiles 1410: Guided Missiles 1420: Guided Missile Components 1425: Guided Missile Systems, Complete 1427: Guided Missile Sub-systems 1430: Guided Missile Remote Control Systems 1440: Launchers, Guided Missile 1450: Guided Missile Handling and Servicing Equipment
Group 15: Aircraft and Airframe Structural Components 1510: Aircraft, Fixed Wing 1520: Aircraft, Rotary Wing 1540: Gliders 1550: Unmanned Aircraft 1560: Airframe Structural Components
Group 16: Aircraft Components and Accessories 1610: Aircraft Propellers and Components 1615: Helicopter Rotor Blades, Drive Mechanisms and Components 1620: Aircraft Landing Gear Components 1630: Aircraft Wheel and Brake Systems 1640: Aircraft Control Cable Products 1650: Aircraft Hydraulic, Vacuum, and De-icing System Components 1660: Aircraft Air Conditioning, Heating, and Pressurizing Equipment 1670: Parachutes; Aerial Pick Up, Delivery, Recovery Systems; and Cargo Tie Down Equipment 1680: Miscellaneous Aircraft Accessories and Components
Group 17: Aircraft Launching, Landing, and Ground Handling Equipment 1710: Aircraft Landing Equipment 1720: Aircraft Launching Equipment 1730: Aircraft Ground Servicing Equipment 1740: Airfield Specialized Trucks and Trailers
Group 18: Space Vehicles 1810: Space Vehicles 1820: Space Vehicle Components 1830: Space Vehicle Remote Control Systems 1840: Space Vehicle Launchers 1850: Space Vehicle Handling and Servicing Equipment 1860: Space Survival Equipment
Group 19: Ships, Small Craft, Pontoons, and Floating Docks 1905: Combat Ships and Landing Vessels 1910: Transport Vessels, Passenger and Troop 1915: Cargo and Tanker Vessels 1920: Fishing Vessels 1925: Special Service Vessels 1930: Barges and Lighters, Cargo 1935: Barges and Lighters, Special Purpose 1940: Small Craft 1945: Pontoons and Floating Docks 1950: Floating Drydocks 1955: Dredges 1990: Miscellaneous Vessels
Group 20: Ship and Marine Equipment 2010: Ship and Boat Propulsion Components 2020: Rigging and Rigging Gear 2030: Deck Machinery 2040: Marine Hardware and Hull Items 2050: Buoys 2060: Commercial Fishing Equipment 2090: Miscellaneous Ship and Marine Equipment
Group 22: Railway Equipment 2210: Locomotives 2220: Rail Cars 2230: Right-of-Way Construction and Maintenance Equipment, Railroad 2240: Locomotive and Rail Car Accessories and Components 2250: Track Material, Railroad
Group 23: Ground Effect Vehicles, Motor Vehicles, Trailers, and Cycles 2305: Ground Effect Vehicles 2310: Passenger Motor Vehicles 2320: Trucks and Truck Tractors, Wheeled 2330: Trailers 2340: Motorcycles, Motor Scooters, and Bicycles 2350: Combat, Assault, and Tactical Vehicles, Tracked 2355: Combat, Assault, and Tactical Vehicles, Wheeled
Group 24: Tractors 2410: Tractor, Full Tracked, Low Speed 2420: Tractors, Wheeled 2430: Tractors, Full Tracked, High Speed
Group 25: Vehicular Equipment Components 2510: Vehicular Cab, Body, and Frame Structural Components 2520: Vehicular Power Transmission Components 2530: Vehicular Brake, Steering, Axle, Wheel, and Track Components 2540: Vehicular Furniture and Accessories 2541: Weapons Systems Specific Vehicular Accessories 2590: Miscellaneous Vehicular Components
Group 26: Tires and Tubes 2610: Tires and Tubes, Pneumatic, Except Aircraft 2620: Tires and Tubes, Pneumatic, Aircraft 2630: Tires, Solid and Cushion 2640: Tire Rebuilding and Tire and Tube Repair Materials
Group 28: Engines, Turbines, and Components 2805: Gasoline Reciprocating Engines, Except Aircraft; and Components 2810: Gasoline Reciprocating Engines, Aircraft Prime Mover; and Components 2815: Diesel Engines and Components 2820: Steam Engines, Reciprocating; and Components 2825: Steam Turbines and Components 2830: Water Turbines and Water Wheels; and Components 2835: Gas Turbines and Jet Engines; Non-Aircraft Prime Mover, Aircraft Non-Prime Mover, and Components 2840: Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components 2845: Rocket Engines and Components 2850: Gasoline Rotary Engines and Components 2895: Miscellaneous Engines and Components
Group 29: Engine Accessories 2910: Engine Fuel System Components, Nonaircraft 2915: Engine Fuel System Components, Aircraft and Missile Prime Movers 2920: Engine Electrical System Components, Nonaircraft 2925: Engine Electrical System Components, Aircraft Prime Moving 2930: Engine Cooling System Components, Nonaircraft 2935: Engine System Cooling Components, Aircraft Prime Moving 2940: Engine Air and Oil Filters, Strainers, and Cleaners, Nonaircraft 2945: Engine Air and Oil Filters, Cleaners, Aircraft Prime Moving 2950: Turbo Supercharger and Components 2990: Miscellaneous Engine Accessories, Nonaircraft 2995: Miscellaneous Engine Accessories, Aircraft
Group 30: Mechanical Power Transmission Equipment 3010: Torque Converters and Speed Changers 3020: Gears, Pulleys, Sprockets, and Transmission Chain 3030: Belting, Drive Belts, Fan Belts, and Accessories 3040: Miscellaneous Power Transmission Equipment
Group 31: Bearings 3110: Ball Bearings, Anti-Friction, Unmounted 3120: Bearings, Plain, Unmounted 3130: Bearings, Mounted 3140: Bearings, Spherical roller
Group 32: Woodworking Machinery and Equipment 3210: Sawmill and Planing Mill Machinery 3220: Woodworking Machines 3230: Tools and Attachments for Woodworking Machinery
Group 33: Historical FSG (used for file maintenance purposes only) 3365: Historical FSC 3375: Historical FSC
Group 34: Metalworking Machinery 3405: Saws and Filing Machines 3408: Machining Centers and Way-Type Machines 3410: Electrical and Ultrasonic Erosion Machines 3411: Boring Machines 3412: Broaching Machines 3413: Drilling and Tapping Machines 3414: Gear Cutting and Finishing Machines 3415: Grinding Machines 3416: Lathes 3417: Milling Machines 3418: Planers and Shapers 3419: Miscellaneous Machine Tools 3422: Rolling Mills and Drawing Machines 3424: Metal Heat Treating and Non-Thermal Treating Equipment 3426: Metal Finishing Equipment 3431: Electric Arc Welding Equipment 3432: Electric Resistance Welding Equipment 3433: Gas Welding, Heat Cutting, and Metalizing Equipment 3436: Welding Positioners and Manipulators 3438: Miscellaneous Welding Equipment 3439: Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories 3441: Bending and Forming Machines 3442: Hydraulic and Pneumatic Presses, Power Driven 3443: Mechanical Presses, Power Driven 3444: Manual Presses 3445: Punching and Shearing Machines 3446: Forging Machinery and Hammers 3447: Wire and Metal Ribbon Forming Machines 3448: Riveting Machines 3449: Miscellaneous Secondary Metal Forming and Cutting Machines 3450: Machine Tools, Portable 3455: Cutting Tools for Machine Tools 3456: Cutting and Forming Tools for Secondary Metalworking Machinery 3460: Machine Tool accessories 3461: Accessories for Secondary Metalworking Machinery 3465: Production Jigs, Fixtures, and Templates 3470: Machine Shop Sets, Kits, and Outfits
Group 35: Service and Trade Equipment 3510: Laundry and Dry Cleaning Equipment 3520: Shoe Repairing Equipment 3530: Industrial Sewing Machines and Mobile Textile Repair Shops 3540: Wrapping and Packaging Machinery 3550: Vending and Coin Operated Machines 3590: Miscellaneous Service and Trade Equipment
Group 36: Special Industry Machinery 3605: Food Products Machinery and Equipment 3610: Printing, Duplicating, and Bookbinding Equipment 3611: Industrial Marking Machines 3615: Pulp and Paper Industries Machinery 3620: Rubber and Plastics Working Machinery 3625: Textile Industries Machinery 3630: Clay and Concrete Products Industries Machinery 3635: Crystal and Glass Industries Machinery 3640: Tobacco Manufacturing Machinery 3645: Leather Tanning and Leather Working Industries Machinery 3650: Chemical and Pharmaceutical Products Manufacturing Machinery 3655: Gas Generating and Dispensing Systems, Fixed or Mobile 3660: Industrial Size Reduction Machinery 3670: Specialized Semiconductor, Microcircuit, and Printed Circuit Board Manufacturing Machinery 3680: Foundry Machinery, Related Equipment and Supplies 3685: Specialized Metal Container Manufacturing Machinery and Related Equipment 3690: Specialized Ammunition and Ordnance Machinery and Related Equipment 3693: Industrial Assembly Machines 3694: Clean Work Stations, Controlled Environment, and Related Equipment 3695: Miscellaneous Special Industry Machinery