The Filter,fluid, cataloged under National Stock Number 1650-00-179-4026, 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 Pall Aeropower Corporation. Government technical data includes 19 specifications, 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 1650-00-179-4026 |
| Primary Part Number | ADA767-4 |
| Item Name | Filter,fluid |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Pall Aeropower Corporation |
| Status | ACTIVE |
| First Discharge Thread Class | 3B |
| Filtering Media Design | PLEATED SINGLE FILTERING MEDIA RESPONSE |
| First Discharge Connection Type | THREADED INTERNAL TUBE SIDE |
| First Intake Nominal Thread Size | 0.4375 INCHES IN |
| First Intake Thread Series Designator | UNF |
| Design Type | REUSABLE |
| First Intake Thread Direction | RIGHT-HAND |
| Body Width | 1.880 INCHES NOMINAL IN |
| Body Height | 1.250 INCHES NOMINAL IN |
| First Intake Connection Type | THREADED INTERNAL TUBE SIDE |
| First Intake Thread Class | 3B |
| Operating Pressure | 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS |
| First Discharge Nominal Thread Size | 0.4375 INCHES IN |
| Features Provided | BY-PASS VALVE |
| Filtering Element Quantity | 1 |
| Body Length | 4.750 INCHES NOMINAL IN |
| First Discharge Thread Direction | RIGHT-HAND |
| Material | STEEL CORROSION RESISTING FILTERING MEDIUM |
| First Discharge Thread Series Designator | UNF |
| 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 |
|---|---|
| ADA767-4 PRIMARY | Pall Aeropower Corporation (USA) |
| 11-10899-1 PRIMARY | Pti Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| 206-076-034-1 | 5/2 Secondary reference U.S. Government activity |
| 206-076-034-101 | 5/2 Secondary reference U.S. Government activity |
| 11-10899 | 5/9 Secondary reference U.S. Government activity |
| 11-10899 | 5/9 Secondary reference U.S. Government activity |
| 11-10899-1 | 5/9 Secondary reference U.S. Government activity |
| 206-076-034 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 1650-00-179-4026 is a Filter,fluid, manufactured by Pall Aeropower Corporation, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-179-4026 has 2 manufacturer part numbers on file: ADA767-4 (Pall Aeropower Corporation), 11-10899-1 (Pti Technologies Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 1650-01-028-0548, 1650-01-276-3953. Verify interchangeability with system specifications before substitution.
Key specifications for ADA767-4: First Discharge Thread Class: 3B; Filtering Media Design: PLEATED SINGLE FILTERING MEDIA RESPONSE; First Discharge Connection Type: THREADED INTERNAL TUBE SIDE; First Intake Nominal Thread Size: 0.4375 INCHES IN. 19 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.