NSN 1660-01-665-2901 · NIIN 016652901 · Part number 123AV12126-3
Northrop Grumman Systems Corporation · FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment · FSG 16 — Aircraft Components and Accessories · CAGE 79RG9
Government record, cited
NSN 1660-01-665-2901 — this item is cataloged by the U.S. Government under National Stock Number 1660-01-665-2901. Manufacturer of record part number: 123AV12126-3.
Also searched as1660-01-665-2901 ·
1660016652901 ·
NIIN 016652901 ·
01-665-2901 ·
FSC 1660 Aircraft Air Conditioning, Heating, and Pressurizing Equipment · CAGE 79RG9 · 123AV12126-3
Nearby stock numbers← 1660-01-665-1873 Heat Exchanger, Fluid to Fluid, Ai
·
1660-01-665-3560 Pan, Drip →
Features
Regulator,oxygen,demand — FSC 1660
1 manufacturer part number on file
Manufacturer of record: Northrop Grumman Systems Corporation
Identification
NSN: 1660-01-665-2901
NIIN: 016652901
FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
FSG: 16 — Aircraft Components and Accessories
Primary part number: 123AV12126-3
Manufacturer: Northrop Grumman Systems Corporation
General Description
The Regulator,oxygen,demand, cataloged under National Stock Number 1660-01-665-2901, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. The manufacturer of record is Northrop Grumman Systems Corporation. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
1660-01-665-2901
Primary Part Number
123AV12126-3
Item Name
Regulator,oxygen,demand
FSC / FSG
1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
Other items in FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1660-00-001-1693
DUCT ASSEMBLY,AIR CONDITIONING-H
1660-00-001-1754
BAFFLE,AIR
1660-00-001-2491
CAGE,BYPASS VALVE
1660-00-001-2493
1660-00-001-2493 · Item name not on file
1660-00-001-2496
CONTROL BOX,ELECTRICAL-ELECTRONI
1660-00-001-2497
1660-00-001-2497 · Item name not on file
1660-00-001-4130
1660-00-001-4130 · Item name not on file
1660-00-001-4479
CONTROLLER,AIR PRESSURE,AIRCRAFT
Frequently Asked Questions
What is NSN 1660-01-665-2901?
NSN 1660-01-665-2901 is a Regulator,oxygen,demand, manufactured by Northrop Grumman Systems Corporation, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
What part numbers are listed for NSN 1660-01-665-2901?
NSN 1660-01-665-2901 has 1 manufacturer part number on file: 123AV12126-3 (Northrop Grumman Systems Corporation).
What are the specifications of 123AV12126-3?
Key specifications for 123AV12126-3: Part Name Assigned by Controlling Agency: OXYGEN REGULATOR; End Item Identification: E-2 AIRCRAFT. 0 specifications are documented in the U.S. Government catalog.
Is NSN 1660-01-665-2901 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.