# NSN 4820-01-439-7241: Valve, Check

NSN 4820-01-439-7241 (also written 4820014397241; NIIN 01-439-7241) is a valve, check in Federal Supply Class 4820, Valves, Nonpowered. 6 manufacturer part numbers from 2 suppliers are on record. It was last purchased in Sep 2026.

## Identification

- NSN: 4820-01-439-7241 (4820014397241)
- NIIN: 01-439-7241 (014397241)
- 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 L: annual buy value is below the screening threshold. (observed 2026-10-10)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAJD | THREAD CLASS | 2B |
| AAJF | THREAD DIRECTION | ALL ENDS RIGHT-HAND |
| AGAV | END ITEM IDENTIFICATION | GENERATOR LUBRICATION SYSTEM ASSY;ALLISON ENGINE CO.INC,DWG NO.23059009 |
| AHNC | CONNECTION STYLE | — |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC |
| AWLS | CONNECTION TYPE | ALL ENDS THREADED INTERNAL BOSS |
| BBJX | MOUNTING POSITION | HORIZONTAL OR VERTICAL |
| CQJX | NOMINAL THREAD SIZE | ALL ENDS INCHES 0.750 |
| CQQF | OPERATING PRESSURE | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 8500.0 |
| CSDC | OPENING PRESSURE SETTING | POUNDS PER SQUARE INCH 0.5 |
| CWFD | NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED | ALL ENDS INCHES 0.500 |
| FEAT | SPECIAL FEATURES | O/A LG 2.470 IN. |
| MATT | MATERIAL | SEAT RUBBER POLYMETHYLENE-PERFLUOROALKYLENE CLASS FKM |
| PRPY | PROPRIETARY CHARACTERISTICS | PACS |
| STYL | STYLE DESIGNATOR | — |
| THSD | THREAD SERIES DESIGNATOR | ALL ENDS UNF |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 23059009 | 63005 | ROLLS-ROYCE CORPORATION | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 23059009 ITEM 38 | 63005 | ROLLS-ROYCE CORPORATION | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 23059087 | 63005 | ROLLS-ROYCE CORPORATION | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 23059087-03 | 63005 | ROLLS-ROYCE CORPORATION | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| TCVF-0500-SS-V-1/2 | 28396 | INTERNATIONAL VALVE CORP DBA CHECK-ALL VALVE MFG. CO. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| TFDSSVT.500SS | 28396 | INTERNATIONAL VALVE CORP DBA CHECK-ALL VALVE MFG. CO. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Price history

Newest first.

| Date | Unit price | Quantity | Supplier | Agency | Source |
| --- | --- | --- | --- | --- | --- |
| 2026-09-16 | $181.95 | 13 | PHOENIX TRADING INC. | — | [record](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820014397241) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820014397241&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820014397241
- 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/4820-01-439-7241/
JSON: https://nsnexplorer.com/api/nsn/4820-01-439-7241.json