The Seat,valve, cataloged under National Stock Number 4820-01-420-2525, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-420-2525 |
| Primary Part Number | 211027772 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Material Document and Classification | QQ-N-281,CLA FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Material | NICKEL ALLOY SEAT |
| Seat Angle in Deg | 45.000 NOMINAL |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 211027772 PRIMARY | Naval Sea Systems Command (USA) |
| 593-6405215 FIND 14 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| DF6002-400-FN-14 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 6405215 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-420-2525 is a Seat,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-420-2525 has 2 manufacturer part numbers on file: 211027772 (Naval Sea Systems Command), 593-6405215 FIND 14 (Naval Sea Systems Command).
Key specifications for 211027772: Material Document and Classification: QQ-N-281,CLA FED SPEC SINGLE MATERIAL RESPONSE SEAT; Special Features: LOWER SEAT; End Item Identification: SEAWOLF CLASS SSN; Material: NICKEL ALLOY SEAT. 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.
NSN 4820-01-420-2525 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.