The Filter,fluid, cataloged under National Stock Number 1650-01-055-3555, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-01-055-3555 |
| Item Name | Filter,fluid |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Status | ACTIVE |
| Filtering Media Design | MESH SINGLE FILTERING MEDIA RESPONSE |
| First Intake Nominal Outside Diameter | 0.625 INCHES IN |
| Filtration Rating in Microns | 15.0 ABSOLUTE |
| First Intake Nominal Thread Size | 0.875 INCHES IN |
| First Intake Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Design Type | REUSABLE |
| Body Outside Diameter | 1.750 INCHES NOMINAL IN |
| First Intake Thread Direction | RIGHT-HAND |
| First Intake Connection Type | THREADED INTERNAL TUBE HEAD SIDE |
| Material Document and Classification | STD 18-8 FED SPEC ALL MATERIAL RESPONSES FILTERING MEDIUM |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS |
| Features Provided | BY-PASS VALVE |
| Filtering Element Quantity | 1 |
| Body Length | 9.199 INCHES NOMINAL IN |
| First Discharge Connection Relationship to Intake Connection | IDENTICAL TO FIRST INTAKE CONNECTION |
| Material | ALUMINUM ALLOY SEDIMENT BOWL |
| Material | STEEL CORROSION RESISTING OR ALUMINUM ALLOY FILTERING MEDIUM |
| First Intake Thread Quantity Per Inch | 14 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 11-11837 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1650-01-055-3555 is a Filter,fluid, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
Key specifications for 1650-01-055-3555: Filtering Media Design: MESH SINGLE FILTERING MEDIA RESPONSE; First Intake Nominal Outside Diameter: 0.625 INCHES IN; Filtration Rating in Microns: 15.0 ABSOLUTE; First Intake Nominal Thread Size: 0.875 INCHES IN. 18 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.