The Seat,valve, cataloged under National Stock Number 4820-01-304-2657, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Dynex/rivett Corp Power Units and Systems. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Seat,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Dynex/rivett Corp Power Units and Systems (CAGE 50988) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-304-2657 |
| Primary Part Number | 9000.290 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Dynex/rivett Corp Power Units and Systems |
| 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 |
|---|---|
| 9000.290 PRIMARY | Dynex/rivett Corp Power Units and Systems (USA) |
| Reference | Meaning |
|---|---|
| 9000-290 | C/1 Advisory reference — outside the item-of-supply concept Dynex/rivett Inc. |
NSN 4820-01-304-2657 is a Seat,valve, manufactured by Dynex/rivett Corp Power Units and Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-304-2657 has 1 manufacturer part number on file: 9000.290 (Dynex/rivett Corp Power Units and Systems).
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.