NSN 1660-01-621-3602 · NIIN 016213602 · Part number DF-12-2-4B
Thermal Transfer Products Ltd · FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment · FSG 16 — Aircraft Components and Accessories · CAGE 55724
Government record, cited
NSN 1660-01-621-3602 — this item is cataloged by the U.S. Government under National Stock Number 1660-01-621-3602. Manufacturer of record part number: DF-12-2-4B.
Also searched as1660-01-621-3602 ·
1660016213602 ·
NIIN 016213602 ·
01-621-3602 ·
FSC 1660 Aircraft Air Conditioning, Heating, and Pressurizing Equipment · CAGE 55724 · DF-12-2-4B
Manufacturer of record: Thermal Transfer Products Ltd
Identification
NSN: 1660-01-621-3602
NIIN: 016213602
FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
FSG: 16 — Aircraft Components and Accessories
Primary part number: DF-12-2-4B
Manufacturer: Thermal Transfer Products Ltd
General Description
The Heat Exchanger,fluid to Air, cataloged under National Stock Number 1660-01-621-3602, 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 Thermal Transfer Products Ltd. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 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
1660-01-621-3602
Primary Part Number
DF-12-2-4B
Item Name
Heat Exchanger,fluid to Air
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 1660-01-621-3602?
NSN 1660-01-621-3602 is a Heat Exchanger,fluid to Air, manufactured by Thermal Transfer Products Ltd, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
What part numbers are listed for NSN 1660-01-621-3602?
NSN 1660-01-621-3602 has 1 manufacturer part number on file: DF-12-2-4B (Thermal Transfer Products Ltd).
What are the specifications of DF-12-2-4B?
Key specifications for DF-12-2-4B: Overall Height: 7.010 INCHES NOMINAL IN; Overall Length: 21.250 INCHES NOMINAL IN; Overall Width: 17.000 INCHES NOMINAL IN; Pressure Rating: ERR-060. 2 specifications are documented in the U.S. Government catalog.
Is NSN 1660-01-621-3602 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.