The Valve,safety Relief, cataloged under National Stock Number 4820-01-472-5582, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-472-5582 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.5000 INCHES FIRST END IN |
| Nominal Pipe Size Accommodated | 0.625 INCHES SECOND END IN |
| Minimum Operating Temp | -40.0 FAHRENHEIT DEGF |
| Operating Pressure | 350.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Operating Pressure | 350.0 POUNDS PER SQUARE INCH (PSI) NOMINAL POWER DRIVE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.625 INCHES SECOND END IN |
| Nominal Thread Size | 0.500 INCHES FIRST END IN |
| Maximum Operating Temp | -40.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Maximum Operating Temp | 145.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Thread Series Designator | NPT FIRST END |
| Opening Pressure Setting | 350.0 POUNDS PER SQUARE INCH LBS |
| Valve Discharge Flow Rate | 28.5 POUNDS PER HOUR LBS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 527-E-350 | 5/9 Secondary reference Henry Technologies, Inc. |
| 5250-1/2-350 | 5/9 Secondary reference Henry Technologies, Inc. |
| 62128 | D/9 Drawing number reference only U.S. Government activity |
| 5240E-350 | 3/9 Design control — primary reference Henry Technologies, Inc. |
NSN 4820-01-472-5582 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5360-01-478-4104. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-472-5582: Nominal Pipe Size Accommodated: 0.5000 INCHES FIRST END IN; Nominal Pipe Size Accommodated: 0.625 INCHES SECOND END IN; Minimum Operating Temp: -40.0 FAHRENHEIT DEGF; Operating Pressure: 350.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 13 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.