# NSN 4730-01-051-0321: Coupling Half, Self-Sealing

NSN 4730-01-051-0321 (also written 4730010510321; NIIN 01-051-0321) is a coupling half, self-sealing in Federal Supply Class 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. 5 manufacturer part numbers from 3 suppliers are on record. It was last purchased in Sep 2026.

## Identification

- NSN: 4730-01-051-0321 (4730010510321)
- NIIN: 01-051-0321 (010510321)
- Item name: COUPLING HALF,SELF-SEALING
- 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 2026-10-10)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAJD | THREAD CLASS | 3A |
| ABHP | OVERALL LENGTH | INCHES MINIMUM 1.787 AND INCHES MAXIMUM 1.817 |
| AEHZ | MAXIMUM OPERATING TEMP | SINGLE RESPONSE FAHRENHEIT 275.0 |
| AHNC | CONNECTION STYLE | — |
| AWLS | CONNECTION TYPE | FIRST FLUID END CONNECTION THREADED EXTERNAL TUBE |
| CQJX | NOMINAL THREAD SIZE | ALL ENDS INCHES 0.438 |
| CQQF | OPERATING PRESSURE | SINGLE RESPONSE POUNDS PER SQUARE INCH (PSI) MAXIMUM 300.0 |
| FEAT | SPECIAL FEATURES | WITH LOCKWIRE HOLES |
| MEDA | MEDIA FOR WHICH DESIGNED | SINGLE RESPONSE HYDRAULIC FLUID, PETROLEUM BASE |
| STYL | STYLE DESIGNATOR | — |
| THSD | THREAD SERIES DESIGNATOR | ALL ENDS UNIFIED NATIONAL JOINT FINE (UNJF) |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 015519-S2-4D | 00624 | EATON AEROQUIP LLC DBA JACKSON NORTH 1 DIV FLUID AND ELECTRICAL DISTRIBUTION | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 4730PL0743873 | 9009H | JEDNOLITY INDEKS MATERIALOWY - UNIFORM MATERIAL INDEX | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 4730PL1777464 | 9009H | JEDNOLITY INDEKS MATERIALOWY - UNIFORM MATERIAL INDEX | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| C698-4-1 | 81755 | LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| TB015519S2-4D | 00624 | EATON AEROQUIP LLC DBA JACKSON NORTH 1 DIV FLUID AND ELECTRICAL DISTRIBUTION | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-09-29 | [SPE7MX20D0003/SPE7MX26F094L](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4730010510321) | COUPLING HALF, SELF-SEALING | EATON AEROQUIP LLC DBA JACKSON NORTH 1 DIV FLUID AND ELECTRICAL DISTRIBUTION | $3,236.55 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4730010510321&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4730010510321
- 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/4730-01-051-0321/
JSON: https://nsnexplorer.com/api/nsn/4730-01-051-0321.json