# NSN 4820-01-281-5856: Valve, Safety Relief

NSN 4820-01-281-5856 (also written 4820012815856; NIIN 01-281-5856) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 2 manufacturer part numbers from 1 supplier are on record. It was last purchased in Aug 2026.

## Identification

- NSN: 4820-01-281-5856 (4820012815856)
- NIIN: 01-281-5856 (012815856)
- 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 R: the government owns neither the data nor the rights, and obtaining them is judged uneconomical. (observed 2026-11-06)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| ADQU | FLOW CONTROL DEVICE | DISK |
| ADSU | DISK LOADING METHOD | SPRING |
| AEHZ | MAXIMUM OPERATING TEMP | SINGLE RESPONSE FAHRENHEIT 180.0 |
| AGAV | END ITEM IDENTIFICATION | SPRUANCE CLASS DD (963) |
| AHNC | CONNECTION STYLE | — |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC OR MANUAL |
| AWLS | CONNECTION TYPE | ALL ENDS UNTHREADED INTERNAL TUBE |
| CQQF | OPERATING PRESSURE | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 400.0 |
| CRTL | CRITICALITY CODE JUSTIFICATION | FEAT |
| CSDC | OPENING PRESSURE SETTING | POUNDS PER SQUARE INCH 40.0 |
| CWFD | NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED | FIRST END INCHES 0.500 |
| CWFD | NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED | SECOND END INCHES 0.375 |
| FEAT | SPECIAL FEATURES | WEAPON SYSTEM ESSENTIAL |
| MATT | MATERIAL | PACKING RUBBER |
| MATT | MATERIAL | BODY COPPER ALLOY |
| MATT | MATERIAL | SEAT RUBBER |
| MEDA | MEDIA FOR WHICH DESIGNED | SINGLE RESPONSE OXYGEN, GASEOUS |
| STYL | STYLE DESIGNATOR | — |
| TMQY | FURNISHED ITEMS AND QUANTITY | LEVER 1 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 1385 P/L 20272340 | 35795 | LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| YB2385BC284 | 35795 | LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-08-10 | [SPE7MC26C0022](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820012815856) | VALVE, SAFETY RELIEF | LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC | $5,810,572.00 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820012815856&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820012815856
- 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/4820-01-281-5856/
JSON: https://nsnexplorer.com/api/nsn/4820-01-281-5856.json