The Valve,safety Relief, cataloged under National Stock Number 4820-01-474-7838, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Raytheon Company Dba Raytheon Co. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-474-7838 |
| Primary Part Number | 11479375 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Raytheon Company Dba Raytheon Co |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Style Designator | STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY. |
| Material Document and Classification | ASTM A582, 300 SERIES ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5640, 300 SERIES ASSN STD SINGLE MATERIAL RESPONSE OR AMS5641, 300 SERIES ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 1.000 INCHES ALL ENDS IN |
| Operating Pressure | 182.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Surface Treatment | PASSIVATE LOCATION NOT OTHERWISE SPECIFIED |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Media for Which Designed | ETHYLENE GLYCOL FIRST RESPONSE |
| Material | STEEL CORROSION RESISTING OVERALL |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4820-01-474-7838 is a Valve,safety Relief, manufactured by Raytheon Company Dba Raytheon Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-474-7838 has 3 manufacturer part numbers on file: 11479375 (Raytheon Company), 11479375 (Raytheon Company Dba Raytheon Co), 11479375 (Us Army Aviation and Missile Command).
Key specifications for 11479375: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE LOCATION NOT OTHERWISE SPECIFIED; Style Designator: STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.; Material Document and Classification: ASTM A582, 300 SERIES ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5640, 300 SERIES ASSN STD SINGLE MATERIAL RESPONSE OR AMS5641, 300 SERIES ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Nominal Outside Diameter Tube Accommodated: 1.000 INCHES ALL ENDS IN. 10 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.
NSN 4820-01-474-7838 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.