The Valve,bleeder,hydraulic System, cataloged under National Stock Number 4820-01-397-5329, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Huntington Ingalls Inc Div Newport News Shipbuilding. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-397-5329 |
| Primary Part Number | 566-6408394-7 |
| Item Name | Valve,bleeder,hydraulic System |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Huntington Ingalls Inc Div Newport News Shipbuilding |
| Status | ACTIVE |
| Flow Control Device | DISKDISK |
| Connection Style | GROOVED (DROP-IN CARTRIDGE) ALL ENDS |
| Connection Type | UNTHREADED CARTRIDGE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material | STEEL CORROSION RESISTING BODY |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 566-6408394-7 PRIMARY | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 211057794 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6408394 | D/9 Drawing number reference only Naval Sea Systems Command |
| 566-6408394-7 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 4820-01-397-5329 is a Valve,bleeder,hydraulic System, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-397-5329 has 2 manufacturer part numbers on file: 566-6408394-7 (Huntington Ingalls Inc Div Newport News Shipbuilding), 211057794 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 3040-01-437-3462, 3040-01-438-0384. Verify interchangeability with system specifications before substitution.
Key specifications for 566-6408394-7: Flow Control Device: DISKDISK; Connection Style: GROOVED (DROP-IN CARTRIDGE) ALL ENDS; Connection Type: UNTHREADED CARTRIDGE ALL ENDS; Style Designator: STRAIGHT THRU. 6 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.
NSN 4820-01-397-5329 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.