FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment · FSG 16 — Aircraft Components and Accessories
Government record, cited
Also searched as1660-01-733-3402 ·
1660017333402 ·
NIIN 017333402 ·
01-733-3402 ·
FSC 1660 Aircraft Air Conditioning, Heating, and Pressurizing Equipment · 213T7501 · 213T7501-3
Nearby stock numbers← 1660-01-733-3361 Duct Assembly, Air Conditioning-H
·
1660-01-733-3408 Duct Assembly, Air Conditioning-H →
Features
Duct Assembly,air Conditioning-H — FSC 1660
Identification
NSN: 1660-01-733-3402
NIIN: 017333402
FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
FSG: 16 — Aircraft Components and Accessories
General Description
The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-733-3402, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Duct Assembly,air Conditioning-H
FSC / FSG
1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment (FSG 16)
Technical Specifications
Parameter
Value
NSN
1660-01-733-3402
Item Name
Duct Assembly,air Conditioning-H
FSC / FSG
1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
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 Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
1660-01-733-3404213T7501-40POSSIBLE MATCH
DUCT ASSEMBLY,AIR CONDITIONING-H
Possible match (shared part number)The Boeing Company Div Defense
1660-01-733-3408213T7501-26POSSIBLE MATCH
DUCT ASSEMBLY,AIR CONDITIONING-H
Possible match (shared part number)The Boeing Company Div Defense
1660-01-733-3726POSSIBLE MATCH
DUCT ASSEMBLY,AIR CONDITIONING-H
Possible match (shared part number)
1660-01-733-3972POSSIBLE MATCH
DUCT ASSEMBLY,AIR CONDITIONING-H
Possible match (shared part number)
1660-01-733-4011POSSIBLE MATCH
DUCT ASSEMBLY,AIR CONDITIONING-H
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
213T7501
D/9Drawing number reference only
U.S. Government activity
213T7501-3
3/2Design control — primary reference
U.S. Government activity
Related Parts
1660-01-733-3404POSSIBLE MATCH
DUCT ASSEMBLY,AIR CONDITIONING-H
213T7501-40
1660-01-733-3408POSSIBLE MATCH
DUCT ASSEMBLY,AIR CONDITIONING-H
213T7501-26
1660-01-733-3726POSSIBLE MATCH
DUCT ASSEMBLY,AIR CONDITIONING-H
1660-01-733-3972POSSIBLE MATCH
DUCT ASSEMBLY,AIR CONDITIONING-H
1660-01-733-4011POSSIBLE MATCH
DUCT ASSEMBLY,AIR CONDITIONING-H
Frequently Asked Questions
What is NSN 1660-01-733-3402?
NSN 1660-01-733-3402 is a Duct Assembly,air Conditioning-H, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
What NSN replaces 1660-01-733-3402?
5 possible matches (shared part number, not a government interchangeability claim): 1660-01-733-3404, 1660-01-733-3408, 1660-01-733-3726. Verify interchangeability with system specifications before substitution.
Is NSN 1660-01-733-3402 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.