# NSN 4820-00-956-1477: Seat, Valve

NSN 4820-00-956-1477 (also written 4820009561477; NIIN 00-956-1477) is a seat, valve in Federal Supply Class 4820, Valves, Nonpowered. 6 manufacturer part numbers from 2 suppliers are on record. It was last purchased in Oct 2026.

## Identification

- NSN: 4820-00-956-1477 (4820009561477)
- NIIN: 00-956-1477 (009561477)
- 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 P: the government does not own the rights to the data needed for more sources. (observed 2026-10-10)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| ADAR | BODY OUTSIDE DIAMETER | INCHES MINIMUM 2.315 AND INCHES MAXIMUM 2.320 |
| ADAS | BODY INSIDE DIAMETER | INCHES MINIMUM 1.374 AND INCHES MAXIMUM 1.375 |
| AJRM | UNDER FLANGE HEIGHT | INCHES MINIMUM 0.183 AND INCHES MAXIMUM 0.186 |
| CQKM | SEATING SURFACE SHAPE | FLAT |
| MATT | MATERIAL | BODY STEEL |
| MATT | MATERIAL | FACE COBALT ALLOY |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | BODY FED SPEC SINGLE MATERIAL RESPONSE QQ-S-763,CLASS 410 |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | FACE MIL SPEC SINGLE MATERIAL RESPONSE -IL-R-17131,TYE -IL-RCOCR-A |
| STYL | STYLE DESIGNATOR | — |
| AJRF | FLANGE SEAT TO DISK END HEIGHT | INCHES MINIMUM 0.752 AND INCHES MAXIMUM 0.755 |
| ABKK | FLANGE DIAMETER | INCHES MINIMUM 2.805 AND INCHES MAXIMUM 2.810 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 591-607 | 27235 | HARDIE-TYNES CO., INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 591-607 | 9E328 | STEWARD MACHINE CO INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 60-591PC607 | 27235 | HARDIE-TYNES CO., INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 60-591PC607 | 9E328 | STEWARD MACHINE CO INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 60-773PC607 | 27235 | HARDIE-TYNES CO., INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 60-773PC607 | 9E328 | STEWARD MACHINE CO INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Price history

Newest first.

| Date | Unit price | Quantity | Supplier | Agency | Source |
| --- | --- | --- | --- | --- | --- |
| 2026-10-06 | $1,395.00 | 15 | STEWARD MACHINE CO INC | — | [record](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820009561477) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-10-06 | [SPE7M227V0116](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820009561477) | SEAT, VALVE | STEWARD MACHINE CO INC | $20,925.00 |
| 2026-09-08 | [SPE7MC26P3554](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820009561477) | SEAT, VALVE | STEWARD MACHINE CO INC | $11,529.00 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4820009561477&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4820009561477
- 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/4820-00-956-1477/
JSON: https://nsnexplorer.com/api/nsn/4820-00-956-1477.json