# NSN 4730-00-278-5490: Inverted Nut, Tube Coupling

NSN 4730-00-278-5490 (also written 4730002785490; NIIN 00-278-5490) is an inverted nut, tube coupling in Federal Supply Class 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. 17 manufacturer part numbers from 11 suppliers are on record. It was last purchased in Sep 2026.

## Identification

- NSN: 4730-00-278-5490 (4730002785490)
- NIIN: 00-278-5490 (002785490)
- 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 C: needs engineering source approval; other sources must qualify first. (observed 2026-10-27)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AJYP | SCREW THREAD SERIES DESIGNATOR | UNF |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| CRTL | CRITICALITY CODE JUSTIFICATION | FEAT |
| AGAV | END ITEM IDENTIFICATION | SUPPORT EQUIPMENT--C-5 AIRCRAFT, T-38 AIRCRAFT, B-52 AIRCRAFT, T-37 AIRCRAFT, OV-10A AIRCRAFT; AIRCRAFT, F-16; SHOP EQUIPMENT, CONTACT MAINT, TRK-MTD, SET 3, TAM B19457; TRACTOR, FLIGHTLINE TOWING |
| ASDB | WIDTH ACROSS FLATS | INCHES NOMINAL 0.313 |
| FEAT | SPECIAL FEATURES | WEAPON SYSTEM ESSENTIAL |
| STYL | STYLE DESIGNATOR | — |
| ABUJ | THREAD SIZE | 5/16-24 |
| ACSV | TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED | INCHES NOMINAL 0.125 |
| AASG | CASEHARDENING INDICATOR | NOT CASE-HARDENED |
| MATT | MATERIAL | COPPER ALLOY |
| AAJD | THREAD CLASS | 2A |
| AJFZ | SEAT RADIUS | INCHES NOMINAL 0.219 |
| BSPX | SMALLEST INSIDE DIAMETER | INCHES NOMINAL 0.128 |
| ABHP | OVERALL LENGTH | INCHES NOMINAL 0.500 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 106-10002 | 79470 | DANA CORP WEATHERHEAD DIV | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 106-10102 | 04255 | DANA CORP WAREHOUSE OPNS FORT WAYNE WAREHOUSE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 121634 | 24617 | GENERAL MOTORS CORP | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 181D1-8 | 30327 | IMPERIAL | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 2-050110 | 04255 | DANA CORP WAREHOUSE OPNS FORT WAYNE WAREHOUSE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 2-050110 | 13174 | PARKER HANNIFIN CORP HOSE PRODUCTS DIV | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 2-050110 | 24617 | GENERAL MOTORS CORP | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 2-050110 | 30327 | IMPERIAL | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 2-050110 | 30760 | INGERSOLL RAND CO | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 2-050110 | 56442 | DIAMOND REO TRUCK CO | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 2-050110 | 72582 | ROLLS-ROYCE SOLUTIONS AMERICA INC DBA ROLLS-ROYCE SOLUTIONS AMERICA INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 2-050110 | 79470 | DANA CORP WEATHERHEAD DIV | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 2-050110 | 81343 | SOCIETY OF AUTOMOTIVE ENGINEERS INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 6100X2 | 01276 | DANFOSS POWER SOLUTIONS II, LLC DIV FLUID CONVEYANCE | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 6100X2 | 79470 | DANA CORP WEATHERHEAD DIV | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 81TS-2 | 93061 | PARKER-HANNIFIN CORP DIV FLUID SYSTEM CONNECTOR DIVISION | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| X1086T38 | 30760 | INGERSOLL RAND CO | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-08 | [SPE7M226V4291](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4730002785490) | INVERTED NUT, TUBE C | — | $3,542.20 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4730002785490&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4730002785490
- 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/4730-00-278-5490/
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