The Seat,valve, cataloged under National Stock Number 4820-01-352-3773, 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 6 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-352-3773 |
| Primary Part Number | 211062942 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Body Outside Diameter | 3.870 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Body Inside Diameter | 3.537 INCHES NOMINAL IN |
| Seat Radius | 0.406 INCHES NOMINAL IN |
| Material | PLASTIC POLYAMIDE NYLON OVERALL |
| Seating Surface Shape | RADIAL |
| 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 |
|---|---|
| 6408576 FIND 10 | Naval Sea Systems Command (USA) |
| 211062942 PRIMARY | Naval Sea Systems Command (USA) |
| 556-6408576-10 | Naval Sea Systems Command (USA) |
| DF330686 FIND 10 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 556-6408576 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-352-3773 is a Seat,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-352-3773 has 4 manufacturer part numbers on file: 6408576 FIND 10 (Naval Sea Systems Command), 211062942 (Naval Sea Systems Command), 556-6408576-10 (Naval Sea Systems Command), DF330686 FIND 10 (Huntington Ingalls Inc Div Newport News Shipbuilding).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-352-3829. Verify interchangeability with system specifications before substitution.
Key specifications for 211062942: Overall Height: 0.469 INCHES NOMINAL IN; Body Outside Diameter: 3.870 INCHES NOMINAL IN; Style Designator: PLAIN; Body Inside Diameter: 3.537 INCHES NOMINAL IN. 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.
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.