# NSN 4730-01-502-7378: Nut, Tube Coupling

NSN 4730-01-502-7378 (also written 4730015027378; NIIN 01-502-7378) is a nut, tube coupling in Federal Supply Class 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. 7 manufacturer part numbers from 2 suppliers are on record. No purchases are on record yet.

## Identification

- NSN: 4730-01-502-7378 (4730015027378)
- NIIN: 01-502-7378 (015027378)
- Item name: 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 T: handled under qualified products list procedures. (observed 2026-10-10)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAJD | THREAD CLASS | 3B |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AARN | FABRICATION METHOD | MACHINED |
| ABAJ | LUBRICATION | DRY FILM LUBRICANT |
| ACTA | NUT STYLE | — |
| ADEA | NUT HEIGHT | INCHES NOMINAL 0.720 |
| ASDB | WIDTH ACROSS FLATS | INCHES MINIMUM 0.557 AND INCHES MAXIMUM 0.567 |
| BRQL | LENGTH TO SHOULDER | INCHES NOMINAL 0.398 |
| BSPX | SMALLEST INSIDE DIAMETER | INCHES NOMINAL 0.519 |
| BZRR | THREAD SERIES | UNIFIED NATIONAL JOINT FINE (UNJF) |
| CMLP | THREAD QUANTITY PER INCH | 20 |
| CQJX | NOMINAL THREAD SIZE | INCHES 0.4375 |
| CQRJ | NOMINAL TUBE OUTSIDE DIAMETER | INCHES 0.250 |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT,FITTING,LIGHTWEIGHT,FLARELESS |
| FEAT | SPECIAL FEATURES | SOLID FILM LUBRICATION |
| MATT | MATERIAL | OVERALL STEEL CORROSION RESISTING |
| SFTT | SURFACE TREATMENT | OVERALL PASSIVATE |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | OVERALL FED SPEC SINGLE TREATMENT RESPONSE QQ--35,TYE II OR VIII |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| AS1792 | 0U583 | SAE INTERNATIONAL DBA SAE INTERNATIONAL | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| AS1792 | 81343 | SOCIETY OF AUTOMOTIVE ENGINEERS INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| AS1792V04N | 0U583 | SAE INTERNATIONAL DBA SAE INTERNATIONAL | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| AS1792V04N | 81343 | SOCIETY OF AUTOMOTIVE ENGINEERS INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| AS18280 | 0U583 | SAE INTERNATIONAL DBA SAE INTERNATIONAL | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| AS18280 | 81343 | SOCIETY OF AUTOMOTIVE ENGINEERS INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| SAE-AS18280 | 0U583 | SAE INTERNATIONAL DBA SAE INTERNATIONAL | [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=4730015027378&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4730015027378
- 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/4730-01-502-7378/
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