The Filter Element,fluid, cataloged under National Stock Number 1650-01-173-5506, 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 Northrop Grumman Systems Corporation. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-01-173-5506 |
| Primary Part Number | 2-43920-3 |
| Item Name | Filter Element,fluid |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Filtering Media Design | PLEATED SINGLE FILTERING MEDIA RESPONSE |
| Body Diameter | 0.906 INCHES NOMINAL IN |
| FSC Application Data | AIRCRAFT HYDRAULIC SYSTEM |
| Body Overall Length | 2.780 INCHES NOMINAL IN |
| Filtration Rating in Microns | 10.0 ABSOLUTE AND 45.0 NOMINAL |
| Flow Direction | INSIDE OUT |
| Drop Pressure | ERR-060 |
| Design Type | NONREUSABLE |
| Temp Rating | -65.0 FAHRENHEIT MINIMUM AND 275.0 FAHRENHEIT MAXIMUM DEGF |
| Style Designator | SUMP TYPE |
| Differential Pressure | ERR-060 |
| Media for Which Designed | FUEL/OIL, HYDROCARBON |
| Material | PAPER FILTERING MEDIUM |
| 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 |
|---|---|
| 2-43920-3 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| 6656172 PRIMARY | Pti Technologies Inc. (USA) |
| 2-43920 | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| Reference | Meaning |
|---|---|
| 2-43920-3 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| 033258-01 | 3/2 Design control — primary reference U.S. Government activity |
| 2-43920-3 | 5/9 Secondary reference Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
| 033258 | 5/1 Secondary reference U.S. Government activity |
NSN 1650-01-173-5506 is a Filter Element,fluid, manufactured by Northrop Grumman Systems Corporation, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-01-173-5506 has 3 manufacturer part numbers on file: 2-43920-3 (Northrop Grumman Systems Corporation), 6656172 (Pti Technologies Inc.), 2-43920 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems).
Key specifications for 2-43920-3: Filtering Media Design: PLEATED SINGLE FILTERING MEDIA RESPONSE; Body Diameter: 0.906 INCHES NOMINAL IN; FSC Application Data: AIRCRAFT HYDRAULIC SYSTEM; Body Overall Length: 2.780 INCHES NOMINAL IN. 13 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.