The Filtering Disk,fluid, cataloged under National Stock Number 1650-00-473-5804, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. The manufacturer of record is Triumph Thermal Systems - Maryland, Inc.. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-00-473-5804 |
| Primary Part Number | 201451 |
| Item Name | Filtering Disk,fluid |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Triumph Thermal Systems - Maryland, Inc. |
| Status | ACTIVE |
| Filtering Media Design | MESH SINGLE FILTERING MEDIA RESPONSE |
| Body Diameter | 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| FSC Application Data | HEAT AND VENT SYSTEM,ACFT |
| Style Designator | ROUND (BASICALLY FLAT W/ AIR BAFFLE) |
| Media for Which Designed | AIR |
| Body Thickness | 0.020 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 201451 | Triumph Thermal Systems - Maryland, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 039904 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1650-00-473-5804 is a Filtering Disk,fluid, manufactured by Triumph Thermal Systems - Maryland, Inc., classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-473-5804 has 1 manufacturer part number on file: 201451 (Triumph Thermal Systems - Maryland, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 5998-01-487-0041, 3010-01-504-4787. Verify interchangeability with system specifications before substitution.
Key specifications for 201451: Filtering Media Design: MESH SINGLE FILTERING MEDIA RESPONSE; Body Diameter: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN; FSC Application Data: HEAT AND VENT SYSTEM,ACFT; Style Designator: ROUND (BASICALLY FLAT W/ AIR BAFFLE). 6 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.