The Filter,fluid, cataloged under National Stock Number 4330-01-221-2143, is classified within Federal Supply Class 4330 (Centrifugals, Separators, and Pressure and Vacuum Filters) of the Pumps and Compressors group. The manufacturer of record is Donaldson Company, Inc.. Government technical data includes 22 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4330-01-221-2143 |
| Primary Part Number | 425900 |
| Item Name | Filter,fluid |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Donaldson Company, Inc. |
| Status | ACTIVE |
| Filtering Media Design | PLEATED SINGLE FILTERING MEDIA RESPONSE |
| Mounting Hole Quantity | 4 |
| Filtration Rating in Microns | 25.0 ABSOLUTE |
| Distance From Bottom of Body to Center of Inlet | 14.400 INCHES MAXIMUM IN |
| First Intake Nominal Thread Size | 1.250 INCHES IN |
| First Intake Thread Series Designator | UN |
| Design Type | REUSABLE |
| Body Outside Diameter | 6.000 INCHES NOMINAL IN |
| Temp Rating | 40.0 FAHRENHEIT MINIMUM AND 160.0 FAHRENHEIT MAXIMUM DEGF |
| First Intake Thread Direction | RIGHT-HAND |
| Body Height | 20.750 INCHES NOMINAL IN |
| First Intake Connection Type | THREADED INTERNAL TUBE SIDE NEAR TOP |
| First Intake Thread Class | 3B |
| Mounting Hole Diameter | 0.531 INCHES NOMINAL IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS |
| Filtering Element Quantity | 1 |
| Filtering System for Which Designed | FULL FLOW |
| First Discharge Connection Relationship to Intake Connection | IDENTICAL TO FIRST INTAKE CONNECTION |
| Media for Which Designed | FUEL/OIL, HYDROCARBON |
| Material | STEEL CORROSION RESISTING SEDIMENT BOWL |
| Material | ALUMINUM ALLOY BODY |
| Mounting Type | UNTHREADED HOLE TOP |
| 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 |
|---|---|
| 425900 PRIMARY | Donaldson Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| TYPE1R CLASSAP- | C/1 Advisory reference — outside the item-of-supply concept Donaldson Company, Inc. |
NSN 4330-01-221-2143 is a Filter,fluid, manufactured by Donaldson Company, Inc., classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-01-221-2143 has 1 manufacturer part number on file: 425900 (Donaldson Company, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5930-01-308-4153. Verify interchangeability with system specifications before substitution.
Key specifications for 425900: Filtering Media Design: PLEATED SINGLE FILTERING MEDIA RESPONSE; Mounting Hole Quantity: 4; Filtration Rating in Microns: 25.0 ABSOLUTE; Distance From Bottom of Body to Center of Inlet: 14.400 INCHES MAXIMUM IN. 22 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.