# NSN 4730-01-056-5521: Coupling, Tube

NSN 4730-01-056-5521 (also written 4730010565521; NIIN 01-056-5521) is a coupling, tube in Federal Supply Class 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. 3 manufacturer part numbers from 3 suppliers are on record. It was last purchased in Aug 2026.

## Identification

- NSN: 4730-01-056-5521 (4730010565521)
- NIIN: 01-056-5521 (010565521)
- Item name: COUPLING,TUBE
- 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 2026-11-01)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AAJD | THREAD CLASS | 3A |
| AHNC | CONNECTION STYLE | — |
| CMLP | THREAD QUANTITY PER INCH | 16 |
| CQJX | NOMINAL THREAD SIZE | SECOND END INCHES 1.000 |
| FEAT | SPECIAL FEATURES | 2 LOCKWIRE HOLES,0.070 IN.DIA |
| MATT | MATERIAL | OVERALL STEEL CORROSION RESISTING |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | OVERALL ASSN STD SINGLE MATERIAL RESPONSE A-S5656 |
| SFTT | SURFACE TREATMENT | OVERALL PASSIVATE |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | OVERALL MIL SPEC SINGLE TREATMENT RESPONSE -IL-S-5002 |
| THSD | THREAD SERIES DESIGNATOR | SECOND END UNJS |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 4730PL0735812 | 9009H | JEDNOLITY INDEKS MATERIALOWY - UNIFORM MATERIAL INDEX | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| C9562-12L | 81755 | LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| D11052-12W | 14798 | DESIGNED METAL CONNECTIONS INC DBA PERMASWAGE USA DIV PERMASWAGE, A PCC COMPANY | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Contract awards

Newest first.

| Date | Award | Description | Recipient | Amount |
| --- | --- | --- | --- | --- |
| 2026-08-24 | [SPE7M324V0984](https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4730010565521) | COUPLING, TUBE | STATZ CORP | $16,424.10 |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4730010565521&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4730010565521
- 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/4730-01-056-5521/
JSON: https://nsnexplorer.com/api/nsn/4730-01-056-5521.json