# NSN 4820-00-400-3948: Valve, Safety Relief

NSN 4820-00-400-3948 (also written 4820004003948; NIIN 00-400-3948) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 4 manufacturer part numbers from 2 suppliers are on record. It was last purchased in Sep 2026.

## Identification

- NSN: 4820-00-400-3948 (4820004003948)
- NIIN: 00-400-3948 (004003948)
- 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 L: annual buy value is below the screening threshold. (observed 2026-10-27)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC |
| CQCY | ADJUSTABLE PRESSURE RANGE | POUNDS PER SQUARE INCH 0.5 TO 300.0 |
| MATT | MATERIAL | OVERALL COPPER ALLOY |
| STYL | STYLE DESIGNATOR | — |
| AEHZ | MAXIMUM OPERATING TEMP | SINGLE RESPONSE FAHRENHEIT 300.0 |
| AWLS | CONNECTION TYPE | SECOND END THREADED INTERNAL PIPE |
| THSD | THREAD SERIES DESIGNATOR | ALL ENDS NPT |
| AWLS | CONNECTION TYPE | FIRST END THREADED EXTERNAL PIPE |
| AHNC | CONNECTION STYLE | — |
| CQJX | NOMINAL THREAD SIZE | ALL ENDS INCHES 2.000 |
| AAJF | THREAD DIRECTION | ALL ENDS RIGHT-HAND |
| ADQU | FLOW CONTROL DEVICE | DISK |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 0020-H01-MC0050 | 01343 | ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 0020-H01-MG0050 | 01343 | ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 0020-H01-MG0050 | 1X5W8 | EMERSON AUTOMATION SOLUTIONS FINAL CONTROL US LP DBA MARINE PRODUCT TEAM DIV MARINE PRODUCT TEAM | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 20-2IN | 01343 | ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-02 | [SPE7MC26P3524](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820004003948) | VALVE, SAFETY RELIEF | T AND T PRODUCTS LLC | $7,563.60 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820004003948&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820004003948
- 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/4820-00-400-3948/
JSON: https://nsnexplorer.com/api/nsn/4820-00-400-3948.json