# NSN 4820-00-595-4790: Valve, Check

NSN 4820-00-595-4790 (also written 4820005954790; NIIN 00-595-4790) is a valve, check in Federal Supply Class 4820, Valves, Nonpowered. 5 manufacturer part numbers from 5 suppliers are on record. No purchases are on record yet.

## Identification

- NSN: 4820-00-595-4790 (4820005954790)
- NIIN: 00-595-4790 (005954790)
- Item name: VALVE,CHECK
- 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: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AHNC | CONNECTION STYLE | — |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC |
| AWLS | CONNECTION TYPE | FIRST END THREADED EXTERNAL TUBE |
| AEHZ | MAXIMUM OPERATING TEMP | SINGLE RESPONSE FAHRENHEIT 160.0 |
| ADSU | DISK LOADING METHOD | SPRING |
| AWLS | CONNECTION TYPE | SECOND END THREADED INTERNAL BOSS |
| THSD | THREAD SERIES DESIGNATOR | SECOND END UNIFIED NATIONAL JOINT (UNJ) |
| AAJD | THREAD CLASS | 3B |
| SFTT | SURFACE TREATMENT | ANODIZE |
| STYL | STYLE DESIGNATOR | — |
| THSD | THREAD SERIES DESIGNATOR | FIRST END UN |
| AAJD | THREAD CLASS | 3A |
| MATT | MATERIAL | SEAT ALUMINUM ALLOY |
| AAJF | THREAD DIRECTION | FIRST END RIGHT-HAND |
| AAJF | THREAD DIRECTION | SECOND END RIGHT-HAND |
| ADQU | FLOW CONTROL DEVICE | DISK |
| MATT | MATERIAL | BODY ALUMINUM ALLOY |
| MATT | MATERIAL | FLOW CONTROL DEVICE ALUMINUM ALLOY 1100 |
| CQQF | OPERATING PRESSURE | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 120.0 |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | FLOW CONTROL DEVICE FED SPEC SINGLE MATERIAL RESPONSE QQ-A-250 TO 1 |
| MEDA | MEDIA FOR WHICH DESIGNED | SINGLE RESPONSE FUEL/OIL, HYDROCARBON |
| CMLP | THREAD QUANTITY PER INCH | 12 |
| CQRB | SEAT ANGLE | FIRST END DEGREES 37.0 |
| CWFD | NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED | FIRST END INCHES 2.000 |
| CQJX | NOMINAL THREAD SIZE | FIRST END INCHES 2.500 |
| CQJX | NOMINAL THREAD SIZE | SECOND END INCHES 2.500 |
| BBJX | MOUNTING POSITION | HORIZONTAL |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 10-2438-2 | 81205 | THE BOEING COMPANY DIV DEFENSE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 1111-558460 | 3H889 | PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 1111-558460 | 45681 | PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 1111-558460 | 92003 | PARKER HANNIFIN CORPORATION DIV AEROSPACE GROUP HEADQUARTERS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 313665 | 81982 | HYDRO-AIRE AEROSPACE CORP | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820005954790&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820005954790
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- 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/4820-00-595-4790/
JSON: https://nsnexplorer.com/api/nsn/4820-00-595-4790.json