FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
FSG: 16 — Aircraft Components and Accessories
General Description
The Cover Assy, cataloged under National Stock Number 1660-00-977-6796, 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Equipment) of the Aircraft Components and Accessories group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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
Cover Assy
FSC / FSG
1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment (FSG 16)
Technical Specifications
Parameter
Value
NSN
1660-00-977-6796
Item Name
Cover Assy
FSC / FSG
1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL B — Remove Demilitarization Key Points
Hazard
No hazard code in the DLA record (HMIC N)
⇄Related Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5950-01-108-049720-2028POSSIBLE MATCH
COIL
Possible match (shared part number)Zenith Electronics Corporation
6515-01-273-8695202.028POSSIBLE MATCH
SCREW,BONE
Possible match (shared part number)Depuy Synthes Sales Inc Dba Depuy Synthes Trauma Div Depuy Synthes Sales, Inc., D/b/a Depuy Synthes Trauma
4820-01-439-5772202028POSSIBLE MATCH
PARTS KIT,PRESSURE REGULATING VA
Possible match (shared part number)Parker-Hannifin Corporation Dba Refrigeration Specialties Div Refrigerating Specialties Division
4810-01-576-7801POSSIBLE MATCH
VALVE,BALL AND ACTUATOR
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
202028
5/9Secondary reference
American Safety Flight Systems Inc
202028
3/9Design control — primary reference
Conax Florida Corporation
Related Parts
5950-01-108-0497POSSIBLE MATCH
COIL
20-2028
6515-01-273-8695POSSIBLE MATCH
SCREW,BONE
202.028
4820-01-439-5772POSSIBLE MATCH
PARTS KIT,PRESSURE REGULATING VA
202028
4810-01-576-7801POSSIBLE MATCH
VALVE,BALL AND ACTUATOR
Frequently Asked Questions
What is NSN 1660-00-977-6796?
NSN 1660-00-977-6796 is a Cover Assy, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
What NSN replaces 1660-00-977-6796?
4 possible matches (shared part number, not a government interchangeability claim): 5950-01-108-0497, 6515-01-273-8695, 4820-01-439-5772. Verify interchangeability with system specifications before substitution.
Is NSN 1660-00-977-6796 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.
What is the DEMIL code for NSN 1660-00-977-6796?
NSN 1660-00-977-6796 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.