# NSN 4820-00-397-9530: Valve, Check

NSN 4820-00-397-9530 (also written 4820003979530; NIIN 00-397-9530) is a valve, check in Federal Supply Class 4820, Valves, Nonpowered. 6 manufacturer part numbers from 6 suppliers are on record. It was last purchased in Sep 2026.

## Identification

- NSN: 4820-00-397-9530 (4820003979530)
- NIIN: 00-397-9530 (003979530)
- 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 |
| --- | --- | --- |
| ADSU | DISK LOADING METHOD | SPRING |
| AWLS | CONNECTION TYPE | SECOND END THREADED EXTERNAL TUBE |
| CQRB | SEAT ANGLE | SECOND END DEGREES 37.0 |
| MATT | MATERIAL | OVERALL ALUMINUM |
| BBJX | MOUNTING POSITION | HORIZONTAL OR VERTICAL |
| SFTT | SURFACE TREATMENT | ANODIZE |
| STYL | STYLE DESIGNATOR | — |
| CQJX | NOMINAL THREAD SIZE | FIRST END INCHES 0.375 |
| AAJD | THREAD CLASS | 2A |
| AAJF | THREAD DIRECTION | FIRST END RIGHT-HAND |
| AAJF | THREAD DIRECTION | SECOND END RIGHT-HAND |
| CQJX | NOMINAL THREAD SIZE | SECOND END INCHES 0.375 |
| AHNC | CONNECTION STYLE | — |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC |
| AWLS | CONNECTION TYPE | FIRST END THREADED EXTERNAL TUBE |
| THSD | THREAD SERIES DESIGNATOR | FIRST END UNF |
| THSD | THREAD SERIES DESIGNATOR | SECOND END UNF |
| ADQU | FLOW CONTROL DEVICE | DISK |
| CQRB | SEAT ANGLE | FIRST END DEGREES 37.0 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 1111-517703-1 | 92003 | PARKER HANNIFIN CORPORATION DIV AEROSPACE GROUP HEADQUARTERS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 316000 | 96124 | TRANSDIGM INC DIV AERO FLUID PRODUCTS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 34-1900-1 | 96736 | AEROCONTROLEX GROUP, INC. DBA AERO FLUID PRODUCTS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 4820PL1573757 | 9009H | JEDNOLITY INDEKS MATERIALOWY - UNIFORM MATERIAL INDEX | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 695620-1 | 98897 | LOCKHEED MARTIN CORP DIV LOCKHEED MARTIN AERONAUTICS COMPANY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 8C111 | 82829 | ALLEN AIRCRAFT PRODUCTS INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Price history

Newest first.

| Date | Unit price | Quantity | Supplier | Agency | Source |
| --- | --- | --- | --- | --- | --- |
| 2026-09-15 | $1,966.2921 | 178 | TRANSAERO, INC. | — | [record](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820003979530) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-15 | [SPE7M226D60KW](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820003979530) | VALVE, CHECK | TRANSAERO, INC. | $350,000.00 |
| 2026-09-09 | [SPE7M126PA143](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820003979530) | VALVE, CHECK | TRANSAERO, INC. | $27,930.00 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820003979530&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820003979530
- 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/4820-00-397-9530/
JSON: https://nsnexplorer.com/api/nsn/4820-00-397-9530.json