The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-191-3798, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is English Electric Corp. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | English Electric Corp (CAGE 61982) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-191-3798 |
| Primary Part Number | RW2/820404 |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | English 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 |
|---|---|
| RW2/820404 PRIMARY | English Electric Corp (USA) |
| Reference | Meaning |
|---|---|
| RW/820404-A1 | 5/9 Secondary reference David Brown Special Products Ltd |
| RW/820404-A1 | C/1 Advisory reference — outside the item-of-supply concept David Brown Gear Systems Limited |
| RW/820404-A1 | 5/9 Secondary reference Brown David Vehicle Products Ltd |
NSN 4820-01-191-3798 is a Valve,relief,pressure and Temper, manufactured by English Electric Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-191-3798 has 1 manufacturer part number on file: RW2/820404 (English Electric Corp).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-192-3453. Verify interchangeability with system specifications before substitution.
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.