Establishments primarily engaged in manufacturing aircraft parts and auxiliary equipment, not elsewhere classified. This industry also includes establishments owned by manufacturers of aircraft parts and auxiliary equipment and primarily engaged in research and development on aircraft parts, whether from enterprise funds or on a contract or fee basis. Establishments primarily engaged in manufacturing or assembling complete aircraft are classified in Industry 3721; those manufacturing aircraft engines and parts are classified in Industry 3724; those manufacturing aeronautical instruments are classified in Industry 3812; those manufacturing aircraft engine electrical (aeronautical electrical) equipment are classified in Industry 3694; and those manufacturing guided missile and space vehicle parts and auxiliary equipment are classified in Industry 3769. Establishments not owned by manufacturers of aircraft parts but primarily engaged in research and development on aircraft parts on a contract or fee basis are classified in Services, Industry 8731.
| Adapter assemblies, hydromatic propeller | Instrument panel mockups: aircraft training units |
| Ailerons, aircraft | Landing gear, aircraft |
| Aircraft armament, except guns | Landing skis and tracks, aircraft |
| Aircraft arresting device system | Link trainers (aircraft training mechanisms) |
| Aircraft assemblies, subƒassemblies, and parts, except engines | Nacelles, aircraft |
| Aircraft body assemblies and parts | Oleo struts, aircraft |
| Aircraft power transmission equipment | Oxygen systems for aircraft |
| Aircraft propeller parts | Panel assemblies (hydromatic propeller test stands), aircraft |
| Airframe assemblies, except for guided missiles | Pontoons, aircraft |
| Airplane brake expanders | Propeller alining tables |
| Alighting assemblies (landing gear), aircraft Beaching gear, aircraft | Propellers, variable and fixed pitch and parts—aircraft |
| Blades, aircraft propeller: metal or wood | Pumps, propeller feathering |
| Bomb racks, aircraft | Refueling equipment, airplane: for use in night |
| Brakes, aircraft | Research and development on aircraft parts and auxiliary equipment |
| Chaffing dispensers, aircraft | Roto-blades for helicopters |
| Countermeasure dispensers, aircraft | Rudders, aircraft |
| Deicing equipment, aircraft | Seat ejector devices, aircraft |
| Dive brakes, aircraft | Spinners, aircraft propeller |
| Dusting and spraying equipment, aircraft | Stabilizers, aircraft |
| Dynetric balancing stands, aircraft | Target drones, aircraft |
| Elevators, aircraft | Targets, trailer type: aircraft |
| Empennage (tail) assemblies and parts aircraft | Tow targets, aircraft |
| Fins, aircraft | Training aids, aircraft: except electronic |
| Flaps, aircraft wing | Transmissions, aircraft |
| Fuel tanks, aircraft: including self-sealing | Turret test fixtures, aircraft |
| Fuselage assemblies, aircraft | Turrets and turret drives, aircraft |
| Gears, power transmission: aircraft | Wheels, aircraft |
| Governors, aircraft propeller feathering | Wing assemblies and parts, aircraft |
| Hubs, aircraft propeller | |
| Codes |
Titles | Total Marketable US Businesses |
| 37280000 | Aircraft parts and equipment, nec | 2,622 |
| 37280100 | Aircraft body and wing assemblies and parts | 87 |
| 37280101 | Ailerons, aircraft | 7 |
| 37280102 | Aircraft body assemblies and parts | 78 |
| 37280103 | Airframe assemblies, except for guided missiles | 14 |
| 37280104 | Bodies, aircraft | 10 |
| 37280105 | Elevators, aircraft | 3 |
| 37280106 | Empennage (tail) assemblies and parts, aircraft | 2 |
| 37280107 | Fins, aircraft | 0 |
| 37280108 | Flaps, aircraft wing | 2 |
| 37280109 | Fuel tanks, aircraft | 13 |
| 37280110 | Fuselage assembly, aircraft | 4 |
| 37280111 | Nacelles, aircraft | 5 |
| 37280112 | Pontoons, aircraft | 3 |
| 37280113 | Rudders, aircraft | 2 |
| 37280114 | Stabilizers, aircraft | 0 |
| 37280115 | Wing assemblies and parts, aircraft | 10 |
| 37280200 | Aircraft propellers and associated equipment | 22 |
| 37280201 | Accumulators, aircraft propeller | 12 |
| 37280202 | Adapter assemblies, hydromatic propeller | 1 |
| 37280203 | Aircraft power transmission equipment | 6 |
| 37280204 | Blades, aircraft propeller: metal or wood | 9 |
| 37280205 | Gears, aircraft power transmission | 17 |
| 37280206 | Governors, aircraft propeller feathering | 2 |
| 37280207 | Hubs, aircraft propeller | 0 |
| 37280208 | Propeller aligning tables | 0 |
| 37280209 | Pumps, propeller feathering | 2 |
| 37280210 | Roto-blades for helicopters | 5 |
| 37280211 | Spinners, aircraft propeller | 0 |
| 37280300 | Aircraft landing assemblies and brakes | 15 |
| 37280301 | Aircraft arresting device system | 2 |
| 37280302 | Airplane brake expanders | 3 |
| 37280303 | Alighting (landing gear) assemblies, aircraft | 13 |
| 37280304 | Brakes, aircraft | 11 |
| 37280305 | Dive brakes, aircraft | 0 |
| 37280306 | Landing skis and tracks, aircraft | 2 |
| 37280307 | Wheels, aircraft | 5 |
| 37280400 | Military aircraft equipment and armament | 69 |
| 37280401 | Aircraft armament, except guns | 1 |
| 37280402 | Bomb racks, aircraft | 0 |
| 37280403 | Chaff dispensers, aircraft | 0 |
| 37280404 | Countermeasure dispensers, aircraft | 1 |
| 37280405 | Turret test fixtures, aircraft | 2 |
| 37280406 | Turrets and turret drives, aircraft | 0 |
| 37280500 | Aircraft training equipment | 23 |
| 37280501 | Link trainers (aircraft training mechanisms) | 3 |
| 37280502 | Target drones | 61 |
| 37280503 | Targets, trailer type: aircraft | 1 |
| 37280504 | Tow targets | 2 |
| 37289901 | Aircraft assemblies, subassemblies, and parts, nec | 228 |
| 37289902 | Beaching gear, aircraft | 1 |
| 37289903 | Deicing equipment, aircraft | 11 |
| 37289904 | Dusting and spraying equipment, aircraft | 5 |
| 37289905 | Dynetric balancing stands, aircraft | 1 |
| 37289907 | Oxygen systems, aircraft | 9 |
| 37289908 | Panel assembly (hydromatic propeller test stands), aircraft | 3 |
| 37289910 | Refueling equipment for use in flight, airplane | 19 |
| 37289911 | Seat ejector devices, aircraft | 2 |
