The Seat,valve, cataloged under National Stock Number 4820-00-337-1178, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Westinghouse Electric Corp. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Seat,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Westinghouse Electric Corp (CAGE 79500) |
| Parameter | Value |
|---|---|
| NSN | 4820-00-337-1178 |
| Primary Part Number | 25J491PC7 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Westinghouse Electric Corp |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 25J491PC7 PRIMARY | Westinghouse Electric Corp (USA) |
| 25J492PC12-62 PRIMARY | Westinghouse Electric Corp (USA) |
| 1387358 PRIMARY | Westinghouse Electric Corp (USA) |
| 25J553PC198 PRIMARY | Westinghouse Electric Corp (USA) |
| 25J641PC198 PRIMARY | Westinghouse Electric Corp (USA) |
| 25J427PC198 PRIMARY | Westinghouse Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| 40J559PC162 | 3/2 Design control — primary reference U.S. Government activity |
| 1387358 | 5/9 Secondary reference Westinghouse Electric Corp Control Business Unit |
| 40J554PC36-40 | 3/2 Design control — primary reference U.S. Government activity |
| 25J491PC7 | 5/9 Secondary reference Westinghouse Electric Corp Control Business Unit |
| 25J553PC198 | 5/9 Secondary reference Westinghouse Electric Corp Control Business Unit |
| 25J427PC198 | 5/9 Secondary reference Westinghouse Electric Corp Control Business Unit |
| 1387358 | 3/2 Design control — primary reference U.S. Government activity |
| 25J492PC12-62 | 5/9 Secondary reference Westinghouse Electric Corp Control Business Unit |
| 25J641PC198 | 5/9 Secondary reference Westinghouse Electric Corp Control Business Unit |
NSN 4820-00-337-1178 is a Seat,valve, manufactured by Westinghouse Electric Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-337-1178 has 6 manufacturer part numbers on file: 25J491PC7 (Westinghouse Electric Corp), 25J492PC12-62 (Westinghouse Electric Corp), 1387358 (Westinghouse Electric Corp), 25J553PC198 (Westinghouse Electric Corp), 25J641PC198 (Westinghouse Electric Corp) and 1 more.
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.