# NSN 4820-00-171-9819: Valve, Regulating, Fluid Pressure

NSN 4820-00-171-9819 (also written 4820001719819; NIIN 00-171-9819) is a valve, regulating, fluid pressure in Federal Supply Class 4820, Valves, Nonpowered. 6 manufacturer part numbers from 3 suppliers are on record. No purchases are on record yet.

## Identification

- NSN: 4820-00-171-9819 (4820001719819)
- NIIN: 00-171-9819 (001719819)
- Item name: VALVE,REGULATING,FLUID PRESSURE
- 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 |
| --- | --- | --- |
| MATT | MATERIAL | BODY COPPER ALLOY |
| THDS | THREAD SIZE AND SERIES/TYPE DESIGNATOR | FIRST END UNF 9 TO 16-18 |
| THDS | THREAD SIZE AND SERIES/TYPE DESIGNATOR | SECOND END NGO 0.908-14 |
| ADQU | FLOW CONTROL DEVICE | STEM AND INTEGRAL DISK |
| ADQZ | END CONNECTION QUANTITY | 2 |
| ADRP | SECOND END THREAD PITCH DIAMETERS | INCHES 0.8616 TO 0.8652 |
| AEVA | OUTLET PRESSURE RANGE | POUNDS PER SQUARE INCH (PSI) 0.0 TO 40.0 |
| AAQL | BODY STYLE | — |
| ABFF | FURNISHED ITEMS | FILTER |
| ACKM | FIRST END CONNECTION TYPE | THREADED EXTERNAL TUBE |
| ACLS | SECOND END CONNECTION TYPE | THREADED INTERNAL GAS CYLINDER |
| AEWB | OUTLET PRESSURE ACCURACY RATING | POUNDS PER SQUARE INCH (PSI) 5.000 |
| ACLH | FIRST END OUTSIDE DIAMETER TUBE ACCOMMODATED | INCHES NOMINAL 0.375 |
| ACLK | FIRST END THREAD CLASS | 2A |
| MEDA | MEDIA FOR WHICH DESIGNED | LOCATION NOT OTHERWISE SPECIFIED OXYGEN, GASEOUS |
| AEVN | REGULATION TYPE | MANUAL SINGLE STAGE |
| AEVR | VALVE LOADING METHOD | SPRING |
| ACLT | SECOND END STYLE DESIGNATOR | — |
| ACMS | SECOND END THREAD DIRECTION | RIGHT-HAND |
| ACTE | FIRST END SEAT ANGLE IN DEG | 30.0 |
| ACTL | SECOND END SEAT RADIUS | INCHES NOMINAL 0.281 |
| AEVZ | MAXIMUM INLET PRESSURE RATING | POUNDS PER SQUARE INCH (PSI) 2000.0 |
| ACLL | FIRST END THREAD DIRECTION | RIGHT-HAND |
| ACLR | SECOND END RELATIONSHIP WITH FIRST END | NOT IDENTICAL |
| MATT | MATERIAL | FLOW CONTROL DEVICE STEEL CORROSION RESISTING |
| ACKN | FIRST END STYLE DESIGNATOR | — |
| ZZZT | NONDEFINITIVE SPEC/STD DATA | TYPE 1 AND CLASS OW1 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 0781-3600 | 63026 | VICTOR EQUIPMENT CO | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 0781-5154 | 63026 | VICTOR EQUIPMENT CO | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 45R1TYPED | 99993 | DEPARTMENT OF THE NAVY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| ESS4-40-540 | 63026 | VICTOR EQUIPMENT CO | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| MILR19180 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| SR450B-540 | 63026 | VICTOR EQUIPMENT CO | [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=4820001719819&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820001719819
- 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/4820-00-171-9819/
JSON: https://nsnexplorer.com/api/nsn/4820-00-171-9819.json