# NSN 4730-00-278-8821: Inverted Nut, Tube Coupling

NSN 4730-00-278-8821 (also written 4730002788821; NIIN 00-278-8821) is an inverted nut, tube coupling in Federal Supply Class 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. 8 manufacturer part numbers from 8 suppliers are on record. No purchases are on record yet.

## Identification

- NSN: 4730-00-278-8821 (4730002788821)
- NIIN: 00-278-8821 (002788821)
- Item name: INVERTED NUT,TUBE COUPLING
- Federal Supply Class: [FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings](https://nsnexplorer.com/fsc/4730/)
- Federal Supply Group: [FSG 47](https://nsnexplorer.com/group/47/)
- Acquisition method suffix code: AMSC L: annual buy value is below the screening threshold. (observed 2026-10-10)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AASG | CASEHARDENING INDICATOR | NOT CASE-HARDENED |
| BSPX | SMALLEST INSIDE DIAMETER | INCHES NOMINAL 0.628 |
| ABHP | OVERALL LENGTH | INCHES NOMINAL 0.781 |
| ABUJ | THREAD SIZE | 7/8-18 |
| AAJD | THREAD CLASS | 2A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AARN | FABRICATION METHOD | BAR STOCK, MACHINED |
| MATT | MATERIAL | COPPER ALLOY |
| STYL | STYLE DESIGNATOR | — |
| AJFZ | SEAT RADIUS | INCHES NOMINAL 0.438 |
| AJYP | SCREW THREAD SERIES DESIGNATOR | UNS |
| ASDB | WIDTH ACROSS FLATS | INCHES NOMINAL 1.000 |
| ACSV | TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED | INCHES NOMINAL 0.625 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 10-050110 | 01276 | DANFOSS POWER SOLUTIONS II, LLC DIV FLUID CONVEYANCE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 10-050110 | 30327 | IMPERIAL | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 10-050110 | 79470 | DANA CORP WEATHERHEAD DIV | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 10-050110 | 81343 | SOCIETY OF AUTOMOTIVE ENGINEERS INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 10-050110 | 86025 | C-S BRASS MFG CO INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 1060-5-8 | 80871 | GEA WESTFALIA SEPARATOR, INC. DIV GEA WESTFALIA SEPARATOR, INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 1060-5-8 | 89153 | SIVERSEN COLUMBIA MACHINE WORKS INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 125633 | 21450 | ARMY WEAPONS COMMAND ATTN AMSWE-REE-S | [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=4730002788821&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4730002788821
- 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/4730-00-278-8821/
JSON: https://nsnexplorer.com/api/nsn/4730-00-278-8821.json