# NSN 4820-01-527-4927: Valve, Safety Relief

NSN 4820-01-527-4927 (also written 4820015274927; NIIN 01-527-4927) is a valve, safety relief in Federal Supply Class 4820, Valves, Nonpowered. 1 manufacturer part number from 1 supplier is on record. It was last purchased in Sep 2026.

## Identification

- NSN: 4820-01-527-4927 (4820015274927)
- NIIN: 01-527-4927 (015274927)
- 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 |
| --- | --- | --- |
| AAJD | THREAD CLASS | 2A |
| AAJF | THREAD DIRECTION | FIRST END RIGHT-HAND |
| AAJF | THREAD DIRECTION | SECOND END RIGHT-HAND |
| ADQU | FLOW CONTROL DEVICE | POPPET |
| ADSR | BONNET TYPE | INSIDE SPRING |
| ADST | BONNET ATTACHMENT METHOD | THREADED |
| ADSU | DISK LOADING METHOD | SPRING |
| AEHZ | MAXIMUM OPERATING TEMP | SINGLE RESPONSE FAHRENHEIT 225.0 |
| AEQJ | MINIMUM OPERATING TEMP | FAHRENHEIT -20.0 |
| AHNC | CONNECTION STYLE | — |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC |
| AWLS | CONNECTION TYPE | FIRST END THREADED EXTERNAL PIPE |
| AWLS | CONNECTION TYPE | SECOND END THREADED EXTERNAL PIPE |
| CMLP | THREAD QUANTITY PER INCH | 12 |
| CQJX | NOMINAL THREAD SIZE | FIRST END INCHES 2.3125 |
| CQJX | NOMINAL THREAD SIZE | SECOND END INCHES 1.750 |
| CQQF | OPERATING PRESSURE | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 6000.0 |
| CSDC | OPENING PRESSURE SETTING | POUNDS PER SQUARE INCH 3300.0 |
| FEAT | SPECIAL FEATURES | ORIFICE SIZE 0.313 INCH |
| MATT | MATERIAL | BODY BRONZE |
| MATT | MATERIAL | FLOW CONTROL DEVICE STEEL CORROSION RESISTING |
| MATT | MATERIAL | SEAT STEEL CORROSION RESISTING |
| MEDA | MEDIA FOR WHICH DESIGNED | SINGLE RESPONSE AIR |
| STYL | STYLE DESIGNATOR | — |
| THSD | THREAD SERIES DESIGNATOR | FIRST END UN |
| THSD | THREAD SERIES DESIGNATOR | SECOND END UN |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 158 PL-5056/.313 3300PSI SET | 99565 | ADMIRAL VALVE LLC DBA CPV MANUFACTURING | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Price history

Newest first.

| Date | Unit price | Quantity | Supplier | Agency | Source |
| --- | --- | --- | --- | --- | --- |
| 2026-09-29 | $2,216.67 | 10 | 32DV7 | — | [record](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820015274927) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-29 | [SPE7MC26V4642](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820015274927) | VALVE, SAFETY RELIEF | — | $22,166.70 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820015274927&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820015274927
- 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/4820-01-527-4927/
JSON: https://nsnexplorer.com/api/nsn/4820-01-527-4927.json