The Valve,safety Relief, cataloged under National Stock Number 4820-01-192-2272, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-192-2272 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | PISTON |
| Operating Pressure | 2750.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Adjustable Pressure Range | +1500.0 TO 2750.0 POUNDS PER SQUARE INCH LBS |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.562 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES FIRST END |
| Disk Loading Method | SPRING |
| Thread Class | 3A FIRST END A |
| Thread Quantity Per Inch | 18 FIRST END |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) FIRST END |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 567670-8 | 5/9 Secondary reference Raytheon Company Div Corp |
| 567670 | D/9 Drawing number reference only Raytheon Company Div Corp |
| 567670-8 | 7/1 Vendor item drawing reference Raytheon Company Dba Raytheon Co |
| 629XB-11-6 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4820-01-192-2272 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-195-0315. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-192-2272: Flow Control Device: PISTON; Operating Pressure: 2750.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Adjustable Pressure Range: +1500.0 TO 2750.0 POUNDS PER SQUARE INCH LBS; Thread Direction: RIGHT-HAND FIRST END. 11 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.