# NSN 4730-00-438-5304: Nut Assembly, Tube Coupling

NSN 4730-00-438-5304 (also written 4730004385304; NIIN 00-438-5304) is a nut assembly, tube coupling in Federal Supply Class 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. 1 manufacturer part number from 1 supplier is on record. The government has 1 open solicitation for it.

## Identification

- NSN: 4730-00-438-5304 (4730004385304)
- NIIN: 00-438-5304 (004385304)
- Item name: NUT ASSEMBLY,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 2026-10-23)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| ABUJ | THREAD SIZE | 2-1/2-12 |
| ACSV | TUBE OUTSIDE DIAMETER FOR WHICH DESIGNED | INCHES NOMINAL 2.000 |
| AAJD | THREAD CLASS | 2B |
| ABKV | OUTSIDE DIAMETER | INCHES NOMINAL 2.608 |
| FEAT | SPECIAL FEATURES | FURNISHED W/TWO SPLIT RINGS |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| MATT | MATERIAL | ALUMINUM ALLOY |
| SFTT | SURFACE TREATMENT | ANODIZE |
| ABHP | OVERALL LENGTH | INCHES NOMINAL 0.610 |
| AJYP | SCREW THREAD SERIES DESIGNATOR | UN |
| STYL | STYLE DESIGNATOR | — |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 63551L104G28 | 79326 | TRANSDIGM INC DIV ADELWIGGINS GROUP | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Open solicitations

| Solicitation | Quantity | Closes | Link |
| --- | --- | --- | --- |
| SPE7M3-27-T-1009 | 30 | 2026-11-16 | [DIBBS](https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4730004385304&category=nsn) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-10-22 | [SPE7M327P0145](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4730004385304) | NUT ASSEMBLY, TUBE C | BOONE AEROSPACE, INC. DBA PROPONENT HELICOPTER SERVICES | $6,800.00 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4730004385304&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4730004385304
- 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/4730-00-438-5304/
JSON: https://nsnexplorer.com/api/nsn/4730-00-438-5304.json