The Filter,fluid, cataloged under National Stock Number 4330-01-031-6455, is classified within Federal Supply Class 4330 (Centrifugals, Separators, and Pressure and Vacuum Filters) of the Pumps and Compressors group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4330-01-031-6455 |
| Item Name | Filter,fluid |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Status | ACTIVE |
| Filtration Rating in Microns | 5.0 NOMINAL |
| First Intake Nominal Thread Size | 0.250 INCHES IN |
| Drop Pressure | ERR-060 |
| First Intake Thread Series Designator | NPT |
| Design Type | REUSABLE |
| Body Outside Diameter | 1.576 INCHES NOMINAL IN |
| First Intake Thread Direction | RIGHT-HAND |
| First Intake Connection Type | THREADED INTERNAL PIPE END |
| Style Designator | INLINE (HYDRAULIC) |
| Operating Pressure | 8000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS |
| Filtering Element Quantity | 1 |
| Body Length | 3.818 INCHES NOMINAL IN |
| Filtering System for Which Designed | FULL FLOW |
| First Discharge Connection Relationship to Intake Connection | IDENTICAL TO FIRST INTAKE CONNECTION |
| Material | STEEL CORROSION RESISTING FILTERING MEDIUM |
| Mounting Type | INLET CONNECTION AND OUTLET CONNECTION LINE |
| 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 |
|---|---|
| 28728-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4330-01-031-6455 is a Filter,fluid, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6540-01-614-4191. Verify interchangeability with system specifications before substitution.
Key specifications for 4330-01-031-6455: Filtration Rating in Microns: 5.0 NOMINAL; First Intake Nominal Thread Size: 0.250 INCHES IN; Drop Pressure: ERR-060; First Intake Thread Series Designator: NPT. 16 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.