NSN 1660-01-678-2539 — this item is cataloged by the U.S. Government under National Stock Number 1660-01-678-2539. Manufacturer of record part number: 27A404-600-1.
Also searched as1660-01-678-2539 ·
1660016782539 ·
NIIN 016782539 ·
01-678-2539 ·
FSC 1660 Aircraft Air Conditioning, Heating, and Pressurizing Equipment · CAGE 14711 · 27A404-600-1
Nearby stock numbers← 1660-01-678-2218 Mounting Base, Oxygen Converter, a
·
1660-01-678-2758 Duct Assembly, Air Conditioning-H →
The Duct Assembly,air Conditioning-H, cataloged under National Stock Number 1660-01-678-2539, 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 Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc. 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
1660-01-678-2539
Primary Part Number
27A404-600-1
Item Name
Duct Assembly,air Conditioning-H
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 1660-01-678-2539?
NSN 1660-01-678-2539 is a Duct Assembly,air Conditioning-H, manufactured by Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
What part numbers are listed for NSN 1660-01-678-2539?
NSN 1660-01-678-2539 has 1 manufacturer part number on file: 27A404-600-1 (Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc).
What are the specifications of 27A404-600-1?
Key specifications for 27A404-600-1: Part Name Assigned by Controlling Agency: DUCT,FLEXIBLE. 0 specifications are documented in the U.S. Government catalog.
Is NSN 1660-01-678-2539 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.