Heat Exchanger, Air to Air, Aircra1660-01-541-4061
NSN 1660-01-541-4061 · NIIN 015414061 · Part number 6661G4
Boyd Corporation (woburn) Inc · FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment · FSG 16 — Aircraft Components and Accessories · CAGE 11245
Government record, cited
NSN 1660-01-541-4061 — this item is cataloged by the U.S. Government under National Stock Number 1660-01-541-4061. Manufacturer of record part number: 6661G4.
Also searched as1660-01-541-4061 ·
1660015414061 ·
NIIN 015414061 ·
01-541-4061 ·
FSC 1660 Aircraft Air Conditioning, Heating, and Pressurizing Equipment · CAGE 11245 · 6661G4 · 4900207
Nearby stock numbers← 1660-01-541-3411 Separator, Water, Aircraft Air Con
·
1660-01-541-5485 Control Box, Electrical-Electroni →
Features
Heat Exchanger,air to Air,aircra — FSC 1660
Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY SOURCE CONTROL DRAWING
2 manufacturer part numbers on file
Manufacturer of record: Boyd Corporation (woburn) Inc
Identification
NSN: 1660-01-541-4061
NIIN: 015414061
FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
FSG: 16 — Aircraft Components and Accessories
Primary part number: 6661G4
Manufacturer: Boyd Corporation (woburn) Inc
General Description
The Heat Exchanger,air to Air,aircra, cataloged under National Stock Number 1660-01-541-4061, 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 Boyd Corporation (woburn) Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
1660-01-541-4061
Primary Part Number
6661G4
Item Name
Heat Exchanger,air to Air,aircra
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.
1660-00-006-4472
FLANGE,VALVE BODY
1660-00-009-5646
ADAPTER ASSEMBLY,BELLOWS
1660-00-019-8389
1660-00-019-8389 · Item name not on file
1660-00-019-8399
1660-00-019-8399 · Item name not on file
1660-00-031-5285
1660-00-031-5285 · Item name not on file
1660-00-302-4390
PISTON,REGULATING V
1660-00-441-0575
PISTON
1660-01-601-0729
ETHERNET SWITCH
Frequently Asked Questions
What is NSN 1660-01-541-4061?
NSN 1660-01-541-4061 is a Heat Exchanger,air to Air,aircra, manufactured by Boyd Corporation (woburn) Inc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
What part numbers are listed for NSN 1660-01-541-4061?
NSN 1660-01-541-4061 has 2 manufacturer part numbers on file: 4900207 (Rtx Corporation Div Pratt & Whitney), 6661G4 (Boyd Corporation (woburn) Inc).
What are the specifications of 6661G4?
Key specifications for 6661G4: Overall Height: 9.090 INCHES NOMINAL IN; Overall Width: 5.750 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: HEAT EXCHANGER, THIRD & FOURTH STAGE; End Item Identification: C-17 AIRCRAFT; U/O NSN 4310-01-459-4689. 1 specification is documented in the U.S. Government catalog.
Is NSN 1660-01-541-4061 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.