The Valve,safety Relief, cataloged under National Stock Number 4820-01-343-5080, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Henry Technologies Limited. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Henry Technologies Limited (CAGE K3070) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-343-5080 |
| Primary Part Number | 5240-1/2 SET POINT 18.6 BAR |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Henry Technologies Limited |
| 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 |
|---|---|
| 5240-1/2 SET POINT 18.6 BAR | Henry Technologies Limited (GBR) |
| Reference | Meaning |
|---|---|
| 5240-1/2 | 5/1 Secondary reference Henry Technologies Limited |
| 5240-1/2 SET POINT 18.6BAR | 3/9 Design control — primary reference Henry Technologies, Inc. |
NSN 4820-01-343-5080 is a Valve,safety Relief, manufactured by Henry Technologies Limited, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-343-5080 has 1 manufacturer part number on file: 5240-1/2 SET POINT 18.6 BAR (Henry Technologies Limited).
2 possible matches (shared part number, not a government interchangeability claim): 5840-01-344-1296, 4820-01-379-3859. 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.