# NSN 4820-01-286-6618: Valve, Safety Relief

NSN 4820-01-286-6618 (also written 4820012866618; NIIN 01-286-6618) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 3 manufacturer part numbers from 2 suppliers are on record. The government has 1 open solicitation for it.

## Identification

- NSN: 4820-01-286-6618 (4820012866618)
- NIIN: 01-286-6618 (012866618)
- 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 2026-10-15)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| ADQU | FLOW CONTROL DEVICE | DISK |
| ADSR | BONNET TYPE | INSIDE SCREW |
| ADST | BONNET ATTACHMENT METHOD | BOLTED |
| AECS | BOLT HOLE QUANTITY | 4 |
| AEHZ | MAXIMUM OPERATING TEMP | SINGLE RESPONSE FAHRENHEIT 250.0 |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC |
| ARKN | FLANGE SHAPE | ALL ENDS ROUND WITH HOLES |
| AWLS | CONNECTION TYPE | ALL ENDS FLANGE |
| CCFG | VALVE SIZE | INCHES 1.500 |
| CQQF | OPERATING PRESSURE | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 300.0 |
| CSDC | OPENING PRESSURE SETTING | POUNDS PER SQUARE INCH 100.0 |
| CWCD | NOMINAL OUTSIDE DIAMETER | FIRST END INCHES 6.000 |
| CWCD | NOMINAL OUTSIDE DIAMETER | SECOND END INCHES 5.000 |
| CWCK | NOMINAL THICKNESS | SECOND END INCHES 0.562 |
| CWCK | NOMINAL THICKNESS | FIRST END INCHES 0.625 |
| CWCL | FIRST CONNECTION FACE TO CENTERLINE DISTANCE | INCHES 3.750 |
| CWCQ | BOLT HOLE NOMINAL DIAMETER | FIRST END INCHES 0.750 |
| CWCQ | BOLT HOLE NOMINAL DIAMETER | SECOND END INCHES 0.625 |
| CWCR | SECOND CONNECTION FACE TO CENTERLINE DISTANCE | INCHES 3.750 |
| CWCT | BOLT CIRCLE NOMINAL DIAMETER | FIRST END INCHES 4.750 |
| CWCT | BOLT CIRCLE NOMINAL DIAMETER | SECOND END INCHES 3.875 |
| CWDF | FLANGE FACE DESIGN | ALL ENDS RAISED STRAIGHT |
| CWDH | RAISED FACE NOMINAL HEIGHT | ALL ENDS INCHES 0.062 |
| CWDL | RAISED FACE NOMINAL DIAMETER | FIRST END INCHES 3.625 |
| CWDL | RAISED FACE NOMINAL DIAMETER | SECOND END INCHES 2.875 |
| MATT | MATERIAL | FLOW CONTROL DEVICE NICKEL ALLOY |
| MATT | MATERIAL | SEAT NICKEL ALLOY |
| MATT | MATERIAL | BODY STEEL |
| MATT | MATERIAL | STEM STEEL CORROSION RESISTING |
| MEDA | MEDIA FOR WHICH DESIGNED | SINGLE RESPONSE WATER-OIL-GAS |
| STYL | STYLE DESIGNATOR | — |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| D50379-AH-CS1 | 11859 | HUNT VALVE COMPANY, INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| D50379-AH-CS1 | 34889 | HUNT VALVE COMPANY INC DBA UNION FLONETICS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| R10AH5J5AH-CS1 | 34889 | HUNT VALVE COMPANY INC DBA UNION FLONETICS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Open solicitations

| Solicitation | Quantity | Closes | Link |
| --- | --- | --- | --- |
| SPE7MC-27-T-0724 | 1 | 2026-10-26 | [DIBBS](https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820012866618&category=nsn) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820012866618&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820012866618
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- 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/4820-01-286-6618/
JSON: https://nsnexplorer.com/api/nsn/4820-01-286-6618.json