# NSN 4820-01-508-4081: Valve, Safety Relief

NSN 4820-01-508-4081 (also written 4820015084081; NIIN 01-508-4081) 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: 4820-01-508-4081 (4820015084081)
- NIIN: 01-508-4081 (015084081)
- 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 2026-10-27)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| MATT | MATERIAL | BODY STEEL |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | RELIEF CONTROL HEAD VALVE |
| FEAT | SPECIAL FEATURES | USED AS A 2ND STAGE RELIEF VALVE SUB-ASSY ON SV115 PRIMARY RELIEF VALVE; LIKE 4820-01-185-6666 IN ALL WAYS EXCEPT INCLUDES ORIFICE PLUG AND SEAL PLATE. |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC |
| AZGM | MOUNTING FACILITY | THREADED FASTENER |
| ADQU | FLOW CONTROL DEVICE | PLUG |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| LL-1552 | 55107 | OLMSTED PRODUCTS COMPANY LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| LL-1552 REV B MODEL M0192A | 55107 | OLMSTED PRODUCTS COMPANY LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| M0192A | 44674 | THE OILGEAR COMPANY DBA JIFFY LUBE 213 DIV OILGEAR | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| M0192A | 55107 | OLMSTED PRODUCTS COMPANY LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-01 | [SPE7MC26V4205](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820015084081) | VALVE, SAFETY RELIEF | ECHELON SUPPLY AND SERVICE, INC. | $7,335.67 |
| 2026-08-11 | [SPE7MC26V3787](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820015084081) | VALVE, SAFETY RELIEF | SCOTT INDUSTRIAL SYSTEMS, INC | $6,651.55 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820015084081&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820015084081
- 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/4820-01-508-4081/
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