# NSN 4820-01-055-4056: Seat, Valve

NSN 4820-01-055-4056 (also written 4820010554056; NIIN 01-055-4056) is a seat, valve in Federal Supply Class 4820, Valves, Nonpowered. 1 manufacturer part number from 1 supplier is on record. It was last purchased in Oct 2026.

## Identification

- NSN: 4820-01-055-4056 (4820010554056)
- NIIN: 01-055-4056 (010554056)
- Item name: SEAT,VALVE
- 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 2026-10-20)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| ADAR | BODY OUTSIDE DIAMETER | INCHES MINIMUM 0.618 AND INCHES MAXIMUM 0.623 |
| ADAS | BODY INSIDE DIAMETER | INCHES NOMINAL 0.316 |
| AJRF | FLANGE SEAT TO DISK END HEIGHT | INCHES MINIMUM 0.050 AND INCHES MAXIMUM 0.060 |
| AJRM | UNDER FLANGE HEIGHT | INCHES MINIMUM 0.900 AND INCHES MAXIMUM 0.910 |
| CQKM | SEATING SURFACE SHAPE | FLAT |
| MATT | MATERIAL | OVERALL ALUMINUM ALLOY 6061 |
| SFTT | SURFACE TREATMENT | OVERALL ANODIZE |
| STYL | STYLE DESIGNATOR | — |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 203160 | 86090 | EATON CORPORATION DBA AIRFRAME | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-10-19 | [SPE7M127V0670](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820010554056) | SEAT, VALVE | LEE AIR COMPANY, INC. | $7,030.00 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820010554056&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820010554056
- 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/4820-01-055-4056/
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