# NSN 4820-01-446-3661: Valve, Vent-Check

NSN 4820-01-446-3661 (also written 4820014463661; NIIN 01-446-3661) is a valve, vent-check in Federal Supply Class 4820, Valves, Nonpowered. 2 manufacturer part numbers from 2 suppliers are on record. It was last purchased in Sep 2026.

## Identification

- NSN: 4820-01-446-3661 (4820014463661)
- NIIN: 01-446-3661 (014463661)
- Item name: VALVE,VENT-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 R: the government owns neither the data nor the rights, and obtaining them is judged uneconomical. (observed 2026-10-23)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| ADQU | FLOW CONTROL DEVICE | BALL |
| AECS | BOLT HOLE QUANTITY | 8 |
| AGAV | END ITEM IDENTIFICATION | WASP CLASS LHD |
| AQLR | VALVE OPERATION METHOD | AUTOMATIC |
| ARKN | FLANGE SHAPE | ALL ENDS ROUND WITH HOLES |
| AWLS | CONNECTION TYPE | ALL ENDS FLANGE |
| BBJX | MOUNTING POSITION | HORIZONTAL |
| CCFG | VALVE SIZE | INCHES 4.000 |
| CWCD | NOMINAL OUTSIDE DIAMETER | ALL ENDS INCHES 9.000 |
| CWCF | FACE TO FACE DISTANCE | INCHES 11.000 |
| CWCK | NOMINAL THICKNESS | ALL ENDS INCHES 0.688 |
| CWCQ | BOLT HOLE NOMINAL DIAMETER | ALL ENDS INCHES 0.750 |
| CWCT | BOLT CIRCLE NOMINAL DIAMETER | ALL ENDS INCHES 7.500 |
| CWDF | FLANGE FACE DESIGN | ALL ENDS PLAIN |
| FEAT | SPECIAL FEATURES | INCLUDES FLAME BARRIER SHIELD |
| MATT | MATERIAL | BODY COPPER ALLOY |
| STYL | STYLE DESIGNATOR | — |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 52-95F 4INBRZ | 09032 | TATE ANDALE, LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 52-95F 4INBRZ | 0W5R1 | RUSS EQUIPMENT CO., INCORPORATED | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-15 | [SPE7MC26P3603](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820014463661) | VALVE, VENT-CHECK | TATE ANDALE, LLC | $54,727.50 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820014463661&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820014463661
- 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/4820-01-446-3661/
JSON: https://nsnexplorer.com/api/nsn/4820-01-446-3661.json