The Cartridge,shut-Off Valve, cataloged under National Stock Number 4820-01-520-9557, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-520-9557 |
| Primary Part Number | 6394399 FIND 003 |
| Item Name | Cartridge,shut-Off Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Operating Pressure | 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Valve Size | 0.750 INCHES IN |
| Features Provided | REMOVABLE HANDLE |
| Material | NICKEL ALLOY |
| 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 |
|---|---|
| 6394399 FIND 003 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6394399 | D/9 Drawing number reference only Naval Sea Systems Command |
| 365-4-H-PL0914 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-520-9557 is a Cartridge,shut-Off Valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-520-9557 has 1 manufacturer part number on file: 6394399 FIND 003 (Naval Sea Systems Command).
Key specifications for 6394399 FIND 003: Operating Pressure: 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS; Valve Size: 0.750 INCHES IN; Features Provided: REMOVABLE HANDLE; Special Features: NEXT HIGHER ASSEMBLY: AHP CROSS CONNECT MANIFOLD ASSEMBLY, P/N 6394399. 4 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.