The Retainer,seat,valve, cataloged under National Stock Number 4820-01-425-1918, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Nihon Seiki Co. Ltd. Government technical data includes 3 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-425-1918 |
| Primary Part Number | EY-3069U PC-24 |
| Item Name | Retainer,seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Nihon Seiki Co. Ltd |
| Status | ACTIVE |
| Valve Model Number for Which Designed | EY-3069U |
| Valve Design Control Activity | S4054 |
| Material | PLASTIC |
| 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 |
|---|---|
| EY-3069U PC-24 | Nihon Seiki Co. Ltd (JPN) |
| Reference | Meaning |
|---|---|
| EY-3069U | D/9 Drawing number reference only Nihon Seiki Co. Ltd |
| EY-3069U PC-24 | 5/9 Secondary reference Fuji Trading America Inc |
| EY-3069U PC-24 | 3/9 Design control — primary reference Nihon Seiki Co. Ltd |
| EY-3096U PC-24 | 5/9 Secondary reference Nihon Seiki Co. Ltd |
| EY-3069U PC-24 | 5/9 Secondary reference Fuji Trading (america) Inc. |
NSN 4820-01-425-1918 is a Retainer,seat,valve, manufactured by Nihon Seiki Co. Ltd, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-425-1918 has 1 manufacturer part number on file: EY-3069U PC-24 (Nihon Seiki Co. Ltd).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-436-2118. Verify interchangeability with system specifications before substitution.
Key specifications for EY-3069U PC-24: Valve Model Number for Which Designed: EY-3069U; Special Features: MEDA IS AIR; Valve Design Control Activity: S4054; End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS. 3 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.