The Valve,safety Relief, cataloged under National Stock Number 4820-01-476-3203, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Vickers Inc Carol Stream Plant. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-476-3203 |
| Primary Part Number | 565919 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Vickers Inc Carol Stream Plant |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Connection Type | THREADED CARTRIDGE ALL ENDS |
| Style Designator | SCREW-IN CARTRIDGE |
| Nominal Thread Size | 0.875 INCHES FIRST END IN |
| Maximum Operating Temp | -40.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Maximum Operating Temp | 248.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Material | ALUMINUM BODY |
| Valve Operation Method | AIR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| RV2-10-I-0-50 | Vickers Inc Carol Stream Plant (USA) |
| 565919 PRIMARY | Vickers Inc Carol Stream Plant (USA) |
| Reference | Meaning |
|---|---|
| RV2-10-I-0-50 | 5/9 Secondary reference Modular Controls Corp |
NSN 4820-01-476-3203 is a Valve,safety Relief, manufactured by Vickers Inc Carol Stream Plant, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-476-3203 has 2 manufacturer part numbers on file: RV2-10-I-0-50 (Vickers Inc Carol Stream Plant), 565919 (Vickers Inc Carol Stream Plant).
Key specifications for 565919: Flow Control Device: POPPET; Connection Type: THREADED CARTRIDGE ALL ENDS; Style Designator: SCREW-IN CARTRIDGE; Nominal Thread Size: 0.875 INCHES FIRST END IN. 8 specifications are documented in the U.S. Government catalog.
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.