# NSN 4730-01-501-2945: Nut, Tube Coupling

NSN 4730-01-501-2945 (also written 4730015012945; NIIN 01-501-2945) is a nut, tube coupling in Federal Supply Class 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. 3 manufacturer part numbers from 2 suppliers are on record. The government has 1 open solicitation for it.

## Identification

- NSN: 4730-01-501-2945 (4730015012945)
- NIIN: 01-501-2945 (015012945)
- 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 2026-11-08)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| BRQL | LENGTH TO SHOULDER | INCHES MINIMUM 0.562 |
| BZRR | THREAD SERIES | UNIFIED NATIONAL JOINT (UNJ) |
| CRRB | SEAT ANGLE | DEGREES NOMINAL 45.00 |
| FEAT | SPECIAL FEATURES | NHA P/N 17P6J4960-517; T.O. 1C-17A-4-49, FIG. 138, INDEX 73. |
| BSPX | SMALLEST INSIDE DIAMETER | INCHES MINIMUM 1.721 AND INCHES MAXIMUM 1.741 |
| ADEA | NUT HEIGHT | INCHES MINIMUM 1.020 AND INCHES MAXIMUM 1.040 |
| ASDB | WIDTH ACROSS FLATS | INCHES MINIMUM 2.230 AND INCHES MAXIMUM 2.270 |
| ACTA | NUT STYLE | — |
| AAJD | THREAD CLASS | 3B |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| CMLP | THREAD QUANTITY PER INCH | 12 |
| CQJX | NOMINAL THREAD SIZE | INCHES 1.875 |
| CQRJ | NOMINAL TUBE OUTSIDE DIAMETER | INCHES 1.500 |
| MATT | MATERIAL | OVERALL ALUMINUM ALLOY 7075 |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| MS21921-24W | 0U583 | SAE INTERNATIONAL DBA SAE INTERNATIONAL | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| MS21921-24W | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M | [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/) |

## Open solicitations

| Solicitation | Quantity | Closes | Link |
| --- | --- | --- | --- |
| SPE7M3-27-T-1173 | 4 | 2026-11-16 | [DIBBS](https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4730015012945&category=nsn) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4730015012945&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4730015012945
- 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/4730-01-501-2945/
JSON: https://nsnexplorer.com/api/nsn/4730-01-501-2945.json