# NSN 4820-01-650-4220: Valve, Safety Relief

NSN 4820-01-650-4220 (also written 4820016504220; NIIN 01-650-4220) 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: 4820-01-650-4220 (4820016504220)
- NIIN: 01-650-4220 (016504220)
- 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 C: needs engineering source approval; other sources must qualify first. (observed 2026-10-10)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| CQQF | OPERATING PRESSURE | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 175.0 |
| AGAV | END ITEM IDENTIFICATION | CO2 INFLATION |
| PRPY | PROPRIETARY CHARACTERISTICS | PACS |
| MATT | MATERIAL | OVERALL STEEL COMP 316L |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | RELIEF VALVE, 1/4" NPT, SET AT 175 PSIG |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| SV175SS | 72661 | DIXON VALVE & COUPLING COMPANY, LLC DIV DIXON FIRE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| WLP001455-002 | 0EYA6 | DEFENSE MARITIME SOLUTIONS, INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| WLP001455-002 REV C PC NO 41 | 0EYA6 | DEFENSE MARITIME SOLUTIONS, INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| WLP001455-002-41 | 0EYA6 | DEFENSE MARITIME SOLUTIONS, INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-24 | [SPE7MC26V3184](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820016504220) | VALVE, SAFETY RELIEF | — | $1,240.00 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820016504220&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820016504220
- 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/4820-01-650-4220/
JSON: https://nsnexplorer.com/api/nsn/4820-01-650-4220.json