The Filter Assembly,fluid, cataloged under National Stock Number 4330-01-437-8918, 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 Naval Sea Systems Command. Government technical data includes 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4330-01-437-8918 |
| Primary Part Number | 6557881-1 |
| Item Name | Filter Assembly,fluid |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Filtration Rating in Microns | 18.0 NOMINAL |
| Design Type | REUSABLE |
| Temp Rating | -30.0 FAHRENHEIT MINIMUM AND 120.0 FAHRENHEIT MAXIMUM DEGF |
| Operating Pressure | 100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Media for Which Designed | GAS |
| Material | STEEL CORROSION RESISTING FILTERING MEDIUM |
| Unit Quantity | 1 |
| 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 |
|---|---|
| 28148-1 | Pall Aeropower Corporation (USA) |
| 6557881-1 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6557881 | D/9 Drawing number reference only Naval Sea Systems Command |
| 28148-1 | 5/9 Secondary reference Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div |
| F3D10158-2 | 5/9 Secondary reference U.S. Government activity |
NSN 4330-01-437-8918 is a Filter Assembly,fluid, manufactured by Naval Sea Systems Command, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-01-437-8918 has 2 manufacturer part numbers on file: 28148-1 (Pall Aeropower Corporation), 6557881-1 (Naval Sea Systems Command).
Key specifications for 6557881-1: Filtration Rating in Microns: 18.0 NOMINAL; Design Type: REUSABLE; Temp Rating: -30.0 FAHRENHEIT MINIMUM AND 120.0 FAHRENHEIT MAXIMUM DEGF; Operating Pressure: 100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS. 7 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.