The Valve,safety Relief, cataloged under National Stock Number 4820-01-379-3859, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Dunham Bush Ltd. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Dunham Bush Ltd (CAGE K4359); Henry Technologies Limited (CAGE K3070) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-379-3859 |
| Primary Part Number | USA-051189A1 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Dunham Bush Ltd |
| 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 |
|---|---|
| USA-051189A1 | Dunham Bush Ltd (GBR) |
| 5240-1/2 SET POINT 375PSI | Henry Technologies Limited (GBR) |
| Reference | Meaning |
|---|---|
| 5240-1/2 SET POINT 375PSI | 3/9 Design control — primary reference Henry Technologies, Inc. |
| 5240-1/2 | 5/1 Secondary reference Henry Technologies Limited |
NSN 4820-01-379-3859 is a Valve,safety Relief, manufactured by Dunham Bush Ltd, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-379-3859 has 2 manufacturer part numbers on file: USA-051189A1 (Dunham Bush Ltd), 5240-1/2 SET POINT 375PSI (Henry Technologies Limited).
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.