NSN 1660-01-491-5499 · NIIN 014915499 · Part number MC21798
Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace · FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment · FSG 16 — Aircraft Components and Accessories · CAGE 76050
Government record, cited
NSN 1660-01-491-5499 — this item is cataloged by the U.S. Government under National Stock Number 1660-01-491-5499. Manufacturer of record part number: MC21798.
Also searched as1660-01-491-5499 ·
1660014915499 ·
NIIN 014915499 ·
01-491-5499 ·
FSC 1660 Aircraft Air Conditioning, Heating, and Pressurizing Equipment · CAGE 76050 · MC21798
Manufacturer of record: Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace
Identification
NSN: 1660-01-491-5499
NIIN: 014915499
FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
FSG: 16 — Aircraft Components and Accessories
Primary part number: MC21798
Manufacturer: Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace
General Description
The Impeller Wheel,aircraft Cooling, cataloged under National Stock Number 1660-01-491-5499, 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 Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
1660-01-491-5499
Primary Part Number
MC21798
Item Name
Impeller Wheel,aircraft Cooling
FSC / FSG
1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
Manufacturer
Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace
Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace (USA)
No interchangeability data on file.
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 1660-01-491-5499?
NSN 1660-01-491-5499 is a Impeller Wheel,aircraft Cooling, manufactured by Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
What part numbers are listed for NSN 1660-01-491-5499?
NSN 1660-01-491-5499 has 1 manufacturer part number on file: MC21798 (Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace).
What are the specifications of MC21798?
Key specifications for MC21798: Special Features: USED ON P/N MC2011-15 AIR COMPRESSOR; End Item Identification: B-2 AIRCRAFT. 0 specifications are documented in the U.S. Government catalog.
Is NSN 1660-01-491-5499 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 1660-01-491-5499?
NSN 1660-01-491-5499 has DEMIL Code D. 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.