The Cover,fluid Filter, cataloged under National Stock Number 4330-01-323-7727, 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 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4330-01-323-7727 |
| Primary Part Number | 6397291-11 |
| Item Name | Cover,fluid Filter |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flange Thickness | 1.060 INCHES NOMINAL IN |
| Inside Corner Radius | 0.380 INCHES NOMINAL IN |
| First Recess Inside Height | 0.480 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | CIRCULAR RECESS |
| Outside Diameter | 10.250 INCHES NOMINAL IN |
| Inside Diameter | 8.250 INCHES NOMINAL IN |
| Fluid Filter Element Retainer | NOT INCLUDED |
| Peripheral Shape Style | CIRCULAR |
| Material | STEEL CORROSION RESISTING |
| Attachment Method | BOLTED |
| Body Thickness | 0.580 INCHES NOMINAL IN |
| 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 |
|---|---|
| 6397291-11 PRIMARY | Naval Sea Systems Command (USA) |
| 803-6397291-11 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6397291 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4330-01-323-7727 is a Cover,fluid Filter, manufactured by Naval Sea Systems Command, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-01-323-7727 has 2 manufacturer part numbers on file: 6397291-11 (Naval Sea Systems Command), 803-6397291-11 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3040-01-324-2729, 4730-01-342-4097. Verify interchangeability with system specifications before substitution.
Key specifications for 6397291-11: Flange Thickness: 1.060 INCHES NOMINAL IN; Inside Corner Radius: 0.380 INCHES NOMINAL IN; First Recess Inside Height: 0.480 INCHES NOMINAL IN; Cross-Sectional Shape Style: CIRCULAR RECESS. 11 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.