# NSN 4820-01-539-3979: Valve, Safety Relief

NSN 4820-01-539-3979 (also written 4820015393979; NIIN 01-539-3979) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 3 manufacturer part numbers from 1 supplier are on record. It was last purchased in Aug 2026.

## Identification

- NSN: 4820-01-539-3979 (4820015393979)
- NIIN: 01-539-3979 (015393979)
- 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 2026-10-10)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| STYL | STYLE DESIGNATOR | — |
| TMQY | FURNISHED ITEMS AND QUANTITY | LEVER 1 |
| CQCY | ADJUSTABLE PRESSURE RANGE | POUNDS PER SQUARE INCH 36.0 TO 42.0 |
| MEDA | MEDIA FOR WHICH DESIGNED | SINGLE RESPONSE OIL |
| MATT | MATERIAL | STEM STEEL COMP 316 |
| CWCL | FIRST CONNECTION FACE TO CENTERLINE DISTANCE | INCHES 3.000 |
| CWDF | FLANGE FACE DESIGN | ALL ENDS RAISED STRAIGHT |
| CWDH | RAISED FACE NOMINAL HEIGHT | ALL ENDS INCHES 0.062 |
| CWDL | RAISED FACE NOMINAL DIAMETER | ALL ENDS INCHES 1.687 |
| ADQU | FLOW CONTROL DEVICE | DISK |
| ADSR | BONNET TYPE | INSIDE SPRING |
| AWLS | CONNECTION TYPE | ALL ENDS FLANGE |
| CCFG | VALVE SIZE | INCHES 0.750 |
| CWCT | BOLT CIRCLE NOMINAL DIAMETER | ALL ENDS INCHES 2.750 |
| AGAV | END ITEM IDENTIFICATION | NEW CONSTRUCTION LCS1 |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC OR MANUAL |
| ARKN | FLANGE SHAPE | ALL ENDS ROUND WITH HOLES |
| CWCQ | BOLT HOLE NOMINAL DIAMETER | ALL ENDS INCHES 0.625 |
| CWCR | SECOND CONNECTION FACE TO CENTERLINE DISTANCE | INCHES 3.000 |
| ADST | BONNET ATTACHMENT METHOD | BOLTED |
| ADSU | DISK LOADING METHOD | SPRING |
| AECS | BOLT HOLE QUANTITY | 4 |
| CWCD | NOMINAL OUTSIDE DIAMETER | ALL ENDS INCHES 3.875 |
| CWCK | NOMINAL THICKNESS | ALL ENDS INCHES 0.500 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 30216 | 72352 | CURTISS-WRIGHT FLOW CONTROL CORPORATION DBA FARRIS ENGINEERING DIV CURTISS-WRIGHT VALVES DIVISION- FARRIS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 30216 AY 85DC22M-140-40PSI | 72352 | CURTISS-WRIGHT FLOW CONTROL CORPORATION DBA FARRIS ENGINEERING DIV CURTISS-WRIGHT VALVES DIVISION- FARRIS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 85DC22M-140-40PSI | 72352 | CURTISS-WRIGHT FLOW CONTROL CORPORATION DBA FARRIS ENGINEERING DIV CURTISS-WRIGHT VALVES DIVISION- FARRIS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Price history

Newest first.

| Date | Unit price | Quantity | Supplier | Agency | Source |
| --- | --- | --- | --- | --- | --- |
| 2026-08-26 | $26,613.09 | 2 | LARKOS PACKING AND DISTRIBUTION INC. | — | [record](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820015393979) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-08-26 | [SPE7MC26V4129](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820015393979) | VALVE, SAFETY RELIEF | LARKOS PACKING AND DISTRIBUTION INC. | $53,226.18 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820015393979&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820015393979
- 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/4820-01-539-3979/
JSON: https://nsnexplorer.com/api/nsn/4820-01-539-3979.json