# NSN 1660-00-083-3506: Valve Assembly, O, YG

NSN 1660-00-083-3506 (also written 1660000833506; NIIN 00-083-3506) is a valve assembly, o, yg in Federal Supply Class 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. 4 manufacturer part numbers from 4 suppliers are on record. It was last purchased in Oct 2026.

## Identification

- NSN: 1660-00-083-3506 (1660000833506)
- NIIN: 00-083-3506 (000833506)
- Item name: VALVE ASSEMBLY,O,YG
- Federal Supply Class: [FSC 1660 Aircraft Air Conditioning, Heating, and Pressurizing Equipment](https://nsnexplorer.com/fsc/1660/)
- Federal Supply Group: [FSG 16](https://nsnexplorer.com/group/16/)
- Acquisition method suffix code: AMSC C: needs engineering source approval; other sources must qualify first. (observed 2026-10-15)
- Acquisition method code: 1

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 128SCEC139-1 | 26512 | NORTHROP GRUMMAN SYSTEMS CORPORATION | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 128SCEC139-1 | 61174 | NORTHROP GRUMMAN SYSTEMS CORPORATION DBA NORTHROP GRUMMAN SYSTEMS CORP DIV NORTHROP GRUMMAN AERONAUTICS SYSTEMS | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 128SCEC139-1 | 79RG9 | NORTHROP GRUMMAN SYSTEMS CORPORATION | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 311000-1 | 83533 | ESSEX INDUSTRIES INC DIV MANUFACTURING DIVISION | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-10-14 | [SPE4A222D0011/SPE4AX27F0856](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=1660000833506) | VALVE ASSEMBLY, O, YG | AEROFORCE LOGISTICS LLC | $22,408.05 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=1660000833506&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=1660000833506
- 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/1660-00-083-3506/
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