NSN 1660-01-479-6640 · NIIN 014796640 · Part number 4090-2
Aerospace Lighting Corporation · FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment · FSG 16 — Aircraft Components and Accessories · CAGE 59579
Government record, cited
NSN 1660-01-479-6640 — this item is cataloged by the U.S. Government under National Stock Number 1660-01-479-6640. Manufacturer of record part number: 4090-2.
Also searched as1660-01-479-6640 ·
1660014796640 ·
NIIN 014796640 ·
01-479-6640 ·
FSC 1660 Aircraft Air Conditioning, Heating, and Pressurizing Equipment · CAGE 59579 · 4090-2 · 4090-02 · GV501K2
Manufacturer of record: Aerospace Lighting Corporation
Identification
NSN: 1660-01-479-6640
NIIN: 014796640
FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
FSG: 16 — Aircraft Components and Accessories
Primary part number: 4090-2
Manufacturer: Aerospace Lighting Corporation
General Description
The Diffuser,air,aircraft Heating an, cataloged under National Stock Number 1660-01-479-6640, 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 Aerospace Lighting Corporation. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
1660-01-479-6640
Primary Part Number
4090-2
Item Name
Diffuser,air,aircraft Heating an
FSC / FSG
1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
Manufacturer
Aerospace Lighting Corporation
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items1
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
6220-01-616-2987409-002-000POSSIBLE MATCH
GUARD,LAMP
Possible match (shared part number)Korry Electronics Co
NSN 1660-01-479-6640 is a Diffuser,air,aircraft Heating an, manufactured by Aerospace Lighting Corporation, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
What part numbers are listed for NSN 1660-01-479-6640?
NSN 1660-01-479-6640 has 2 manufacturer part numbers on file: 4090-02 (Aerospace Lighting Corporation), 4090-2 (Aerospace Lighting Corporation).
What NSN replaces 1660-01-479-6640?
1 possible match (shared part number, not a government interchangeability claim): 6220-01-616-2987. Verify interchangeability with system specifications before substitution.
What are the specifications of 4090-2?
Key specifications for 4090-2: End Item Identification: E-8C. 0 specifications are documented in the U.S. Government catalog.
Is NSN 1660-01-479-6640 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.