# NSN 4820-01-659-4447: Valve, Safety Relief

NSN 4820-01-659-4447 (also written 4820016594447; NIIN 01-659-4447) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 3 manufacturer part numbers from 2 suppliers are on record. It was last purchased in Sep 2026.

## Identification

- NSN: 4820-01-659-4447 (4820016594447)
- NIIN: 01-659-4447 (016594447)
- 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 |
| --- | --- | --- |
| ADQU | FLOW CONTROL DEVICE | POPPET |
| ADSU | DISK LOADING METHOD | SPRING |
| AEHZ | MAXIMUM OPERATING TEMP | SINGLE RESPONSE FAHRENHEIT 165.00 |
| AEQJ | MINIMUM OPERATING TEMP | FAHRENHEIT -320.00 |
| AGAV | END ITEM IDENTIFICATION | 3655-01-604-1576 |
| AWLS | CONNECTION TYPE | FIRST END THREADED EXTERNAL PIPE |
| CMLP | THREAD QUANTITY PER INCH | 18 |
| CQCY | ADJUSTABLE PRESSURE RANGE | POUNDS PER SQUARE INCH 50.00 TO 500.00 |
| CQJX | NOMINAL THREAD SIZE | FIRST END INCHES 0.250 |
| CSDC | OPENING PRESSURE SETTING | POUNDS PER SQUARE INCH 100.00 |
| CWCF | FACE TO FACE DISTANCE | INCHES 2.50 |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | VALVE, PRESSURE RELIEF |
| MATT | MATERIAL | BODY COPPER ALLOY |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | BODY ASSN STD SINGLE MATERIAL RESPONSE AST- B61 |
| PRPY | PROPRIETARY CHARACTERISTICS | PACS |
| STYL | STYLE DESIGNATOR | — |
| SUPP | SUPPLEMENTARY FEATURES | CLEAN AND INDIVIDUAL PACKAGE FOR OXYGEN SERVICE; |
| THSD | THREAD SERIES DESIGNATOR | FIRST END NPT |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 8C-0684 | 19062 | ESSEX INDUSTRIES, INC. DBA ESSEX INDUSTRIES | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 8C-0684-0005 | 19062 | ESSEX INDUSTRIES, INC. DBA ESSEX INDUSTRIES | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| LCV-250B-K-100 | 98678 | GENERANT COMPANY, INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Price history

Newest first.

| Date | Unit price | Quantity | Supplier | Agency | Source |
| --- | --- | --- | --- | --- | --- |
| 2026-09-21 | $292.50 | 2 | PHOENIX TRADING INC. | — | [record](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820016594447) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-21 | [SPE7MC26V4536](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820016594447) | VALVE, SAFETY RELIEF | PHOENIX TRADING INC. | $585.00 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820016594447&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820016594447
- 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/4820-01-659-4447/
JSON: https://nsnexplorer.com/api/nsn/4820-01-659-4447.json