# NSN 4820-01-438-0521: Valve, Calibrated Flow

NSN 4820-01-438-0521 (also written 4820014380521; NIIN 01-438-0521) is a valve, calibrated flow in Federal Supply Class 4820, Valves, Nonpowered. 8 manufacturer part numbers from 3 suppliers are on record. The government has 1 open solicitation for it.

## Identification

- NSN: 4820-01-438-0521 (4820014380521)
- NIIN: 01-438-0521 (014380521)
- Item name: VALVE,CALIBRATED FLOW
- 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 B: must be bought from the sources named on a source control or selected item drawing. (observed 2026-10-13)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAQL | BODY STYLE | — |
| ACKM | FIRST END CONNECTION TYPE | THREADED EXTERNAL TUBE |
| ACKN | FIRST END STYLE DESIGNATOR | — |
| ACLH | FIRST END OUTSIDE DIAMETER TUBE ACCOMMODATED | INCHES NOMINAL 0.500 |
| ACLK | FIRST END THREAD CLASS | 3A |
| ACLL | FIRST END THREAD DIRECTION | RIGHT-HAND |
| ACLR | SECOND END RELATIONSHIP WITH FIRST END | NOT IDENTICAL |
| ACLS | SECOND END CONNECTION TYPE | THREADED EXTERNAL TUBE |
| ACLT | SECOND END STYLE DESIGNATOR | — |
| ACMP | SECOND END OUTSIDE DIAMETER TUBE ACCOMMODATED | INCHES NOMINAL 0.375 |
| ACMR | SECOND END THREAD CLASS | 3A |
| ACMS | SECOND END THREAD DIRECTION | RIGHT-HAND |
| ACTE | FIRST END SEAT ANGLE IN DEG | 37.0 |
| ACTF | SECOND END SEAT ANGLE IN DEG | 37.0 |
| ADQU | FLOW CONTROL DEVICE | POPPET |
| ADQZ | END CONNECTION QUANTITY | 2 |
| ADSY | VALVE DISCHARGE FLOW RATE | GALLONS PER MINUTE 4.25 |
| AGAV | END ITEM IDENTIFICATION | TICONDEROGA CLASS CG (47) |
| MATT | MATERIAL | BODY STEEL CORROSION RESISTING |
| SFTT | SURFACE TREATMENT | OUTSIDE PASSIVATE |
| THDS | THREAD SIZE AND SERIES/TYPE DESIGNATOR | FIRST END UNIFIED NATIONAL JOINT FINE (UNJF) 3 TO 4-16 |
| THDS | THREAD SIZE AND SERIES/TYPE DESIGNATOR | SECOND END UNIFIED NATIONAL JOINT FINE (UNJF) MODIFIED 9 TO 16-18 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 6323384 | 53711 | NAVAL SEA SYSTEMS COMMAND | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 6323384-22 | 53711 | NAVAL SEA SYSTEMS COMMAND | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 6323384-6 | 53711 | NAVAL SEA SYSTEMS COMMAND | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 8941-06 | 98087 | ITT AEROSPACE CONTROLS LLC DBA ITT AEROSPACE CONTROLS UNIT S | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 8941-6 | 98087 | ITT AEROSPACE CONTROLS LLC DBA ITT AEROSPACE CONTROLS UNIT S | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 8970-22 | 98087 | ITT AEROSPACE CONTROLS LLC DBA ITT AEROSPACE CONTROLS UNIT S | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| Q2360-05-6 | 98939 | AEROCONTROLEX GROUP, INC. DBA AERO FLUID PRODUCTS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| Q2360-06-6 | 98939 | AEROCONTROLEX GROUP, INC. DBA AERO FLUID PRODUCTS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Open solicitations

| Solicitation | Quantity | Closes | Link |
| --- | --- | --- | --- |
| SPE7MC-27-T-0507 | 32 | 2026-10-23 | [DIBBS](https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820014380521&category=nsn) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820014380521&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820014380521
- 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/4820-01-438-0521/
JSON: https://nsnexplorer.com/api/nsn/4820-01-438-0521.json