# NSN 4820-01-283-1832: Valve, Safety Relief

NSN 4820-01-283-1832 (also written 4820012831832; NIIN 01-283-1832) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 1 manufacturer part number from 1 supplier is on record. It was last purchased in Oct 2026.

## Identification

- NSN: 4820-01-283-1832 (4820012831832)
- NIIN: 01-283-1832 (012831832)
- 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 2026-10-28)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAJF | THREAD DIRECTION | ALL ENDS RIGHT-HAND |
| ADQU | FLOW CONTROL DEVICE | DISK |
| ADSR | BONNET TYPE | INSIDE SPRING |
| ADST | BONNET ATTACHMENT METHOD | UNION |
| ADSU | DISK LOADING METHOD | SPRING |
| AEHZ | MAXIMUM OPERATING TEMP | FIRST RESPONSE FAHRENHEIT 406.0 |
| AEHZ | MAXIMUM OPERATING TEMP | SECOND RESPONSE FAHRENHEIT 300.0 |
| AHNC | CONNECTION STYLE | — |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC |
| AWLS | CONNECTION TYPE | FIRST END THREADED EXTERNAL PIPE |
| AWLS | CONNECTION TYPE | SECOND END THREADED INTERNAL PIPE |
| CQJX | NOMINAL THREAD SIZE | SECOND END INCHES 0.750 |
| CQJX | NOMINAL THREAD SIZE | FIRST END INCHES 0.500 |
| CQQF | OPERATING PRESSURE | SECOND RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 300.0 |
| CQQF | OPERATING PRESSURE | FIRST RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 250.0 |
| CSDC | OPENING PRESSURE SETTING | POUNDS PER SQUARE INCH 300.0 |
| MATT | MATERIAL | STEM STEEL |
| MATT | MATERIAL | FLOW CONTROL DEVICE STEEL CORROSION RESISTING |
| MATT | MATERIAL | BODY STEEL CORROSION RESISTING |
| MEDA | MEDIA FOR WHICH DESIGNED | FIRST RESPONSE STEAM |
| MEDA | MEDIA FOR WHICH DESIGNED | THIRD RESPONSE GAS, INERT |
| MEDA | MEDIA FOR WHICH DESIGNED | SECOND RESPONSE AIR |
| STYL | STYLE DESIGNATOR | — |
| THSD | THREAD SERIES DESIGNATOR | ALL ENDS NPT |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 80-4S .50IN | 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 |
| --- | --- | --- | --- | --- |
| 2026-10-27 | [SPE7M127P0796](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820012831832) | VALVE, SAFETY RELIEF | T AND T PRODUCTS LLC | $764.00 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820012831832&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820012831832
- 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/4820-01-283-1832/
JSON: https://nsnexplorer.com/api/nsn/4820-01-283-1832.json