# NSN 4820-01-474-7838: Valve, Safety Relief

NSN 4820-01-474-7838 (also written 4820014747838; NIIN 01-474-7838) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 4 manufacturer part numbers from 4 suppliers are on record. It was last purchased in Sep 2026.

## Identification

- NSN: 4820-01-474-7838 (4820014747838)
- NIIN: 01-474-7838 (014747838)
- Item name: VALVE,SAFETY RELIEF
- Federal Supply Class: [FSC 4820 Valves, Nonpowered](https://nsnexplorer.com/fsc/4820/)
- Federal Supply Group: [FSG 48](https://nsnexplorer.com/group/48/)
- Acquisition method suffix code: AMSC D: the data needed to compete the part is unavailable or cannot be obtained economically. (observed 2026-10-10)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC |
| CQQF | OPERATING PRESSURE | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 182.0 |
| CWFD | NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED | ALL ENDS INCHES 1.000 |
| FEAT | SPECIAL FEATURES | NEXT HIGHER ASSEMBLY NSN 5999-01-411-7098, COOLER, FLUID, ELECTRONIC EQUIPMENT. 82 PLUS/MINUS PSI.SUPPGITEM USED IN A HIGH PURITY COOLING SYSTEM. ST BE THOROUGHLY CLEANED AND FREE FROM GREASE, OIL, FLUXES, LIQUID CONTAMINANTS OF ANY KIND AND OTHER FOREIGN MATERIAL SUCH AS METAL CHIPS OR LINT. ALL PORTS AND CONNECTIONS SHALL BE SEALED AND PROTECTED WITH CAPS, PLUGS AND ANY MEANS SUITABLE IN PROHIBITING THE ENTRANCE OF FOREIGN MATERIAL DURING SHIPPING AND STORAGE.AGAVGNSN 1430-01-418-4396, RADAR SET, SEMITRAILER MOUNTED |
| MATT | MATERIAL | OVERALL STEEL CORROSION RESISTING |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | OVERALL ASSN STD SINGLE MATERIAL RESPONSE AST- A582, 300 SERIES OR ASSN STD SINGLE MATERIAL RESPONSE A-S 5640, 300 SERIES OR ASSN STD SINGLE MATERIAL RESPONSE A-S5641, 300 SERIES |
| MEDA | MEDIA FOR WHICH DESIGNED | FIRST RESPONSE ETHYLENE GLYCOL |
| MEDA | MEDIA FOR WHICH DESIGNED | SECOND RESPONSE WATER-OIL-GAS |
| SFTT | SURFACE TREATMENT | LOCATION NOT OTHERWISE SPECIFIED PASSIVATE |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | LOCATION NOT OTHERWISE SPECIFIED FED SPEC SINGLE TREATMENT RESPONSE QQ--35 |
| STYL | STYLE DESIGNATOR | — |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 11479375 | 18876 | US ARMY AVIATION AND MISSILE COMMAND | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 11479375 | 3B150 | RAYTHEON COMPANY DBA RAYTHEON CO | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 11479375 | 49956 | RAYTHEON COMPANY DIV CORP | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 11479375 | 54X10 | RAYTHEON COMPANY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-22 | [SPE7MX21D0057/SPE7M126FA179](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820014747838) | VALVE, SAFETY RELIEF | RAYTHEON COMPANY | $103,061.75 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820014747838&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820014747838
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- USAspending contract actions (each award above links to its record)
- All data is public U.S. government data; every row above links to its source record where one exists.

Canonical page: https://nsnexplorer.com/nsn/4820-01-474-7838/
JSON: https://nsnexplorer.com/api/nsn/4820-01-474-7838.json