NSN 1660-00-321-5733 · NIIN 003215733 · Part number U535304
Triumph Thermal Systems, Llc · FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment · FSG 16 — Aircraft Components and Accessories · CAGE 78943
Government record, cited
NSN 1660-00-321-5733 — this item is cataloged by the U.S. Government under National Stock Number 1660-00-321-5733. Manufacturer of record part number: U535304.
Also searched as1660-00-321-5733 ·
1660003215733 ·
NIIN 003215733 ·
00-321-5733 ·
FSC 1660 Aircraft Air Conditioning, Heating, and Pressurizing Equipment · CAGE 78943 · U535304
General Characteristics Item Description: ALUMINUM ALLOY AMS4117 ALLOY 6061 T6,1.438 IN. OD,0.293IN. MIN 0.333 IN. MAX LG O/A IN
1 manufacturer part number on file
Manufacturer of record: Triumph Thermal Systems, Llc
Identification
NSN: 1660-00-321-5733
NIIN: 003215733
FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
FSG: 16 — Aircraft Components and Accessories
Primary part number: U535304
Manufacturer: Triumph Thermal Systems, Llc
General Description
The Cap,thermal Valve, cataloged under National Stock Number 1660-00-321-5733, 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 Triumph Thermal Systems, Llc. 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
1660-00-321-5733
Primary Part Number
U535304
Item Name
Cap,thermal Valve
FSC / FSG
1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
Manufacturer
Triumph Thermal Systems, Llc
Status
ACTIVE
FSC Application Data
F15 ACFT
General Characteristics Item Description
ALUMINUM ALLOY AMS4117 ALLOY 6061 T6,1.438 IN. OD,0.293IN. MIN 0.333 IN. MAX LG O/A IN
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 1660-00-321-5733?
NSN 1660-00-321-5733 is a Cap,thermal Valve, manufactured by Triumph Thermal Systems, Llc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
What part numbers are listed for NSN 1660-00-321-5733?
NSN 1660-00-321-5733 has 1 manufacturer part number on file: U535304 (Triumph Thermal Systems, Llc).
What are the specifications of U535304?
Key specifications for U535304: FSC Application Data: F15 ACFT; General Characteristics Item Description: ALUMINUM ALLOY AMS4117 ALLOY 6061 T6,1.438 IN. OD,0.293IN. MIN 0.333 IN. MAX LG O/A IN; End Item Identification: RESERVOIR ASSEMBLY US534121-7. 2 specifications are documented in the U.S. Government catalog.
Is NSN 1660-00-321-5733 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 1660-00-321-5733?
NSN 1660-00-321-5733 has DEMIL Code Q. 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.