# NSN 4420-01-338-9731: Core Assembly, Fluid Cooler

NSN 4420-01-338-9731 (also written 4420013389731; NIIN 01-338-9731) is a core assembly, fluid cooler in Federal Supply Class 4420, Heat Exchangers and Steam Condensers. 5 manufacturer part numbers from 2 suppliers are on record. No purchases are on record yet.

## Identification

- NSN: 4420-01-338-9731 (4420013389731)
- NIIN: 01-338-9731 (013389731)
- Item name: CORE ASSEMBLY,FLUID COOLER
- Federal Supply Class: [FSC 4420 Heat Exchangers and Steam Condensers](https://nsnexplorer.com/fsc/4420/)
- Federal Supply Group: [FSG 44](https://nsnexplorer.com/group/44/)
- 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 |
| --- | --- | --- |
| AGAV | END ITEM IDENTIFICATION | COOLER FLUID |
| AKMJ | CORE LENGTH | INCHES NOMINAL 89.875 |
| AQRX | TUBING OUTSIDE DIAMETER | BOTH INLET AND OUTLET TUBE ENDS INCHES NOMINAL 0.375 |
| ARNF | TUBE QUANTITY | 442 |
| AWMZ | TUBE ATTACHMENT METHOD | EXPANDED BOTH ENDS |
| BRXN | HEAT TRANSFER METHOD | INDIRECT |
| CTRC | EFFECTIVE HEAT TRANSFER SURFACE AREA | SQUARE FEET 324.0 |
| MATT | MATERIAL | TUBES COPPER ALLOY 715 |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | TUBES MIL SPEC SINGLE MATERIAL RESPONSE -IL-T-15005 |
| STYL | STYLE DESIGNATOR | — |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 4-116-12-090-00 | 51900 | ITT CORPORATION DBA ITT STANDARD | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 411612090001 | 51900 | ITT CORPORATION DBA ITT STANDARD | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 411612090001 | 6LE50 | FLUID HANDLING LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 512612090001 PIECE 2 | 51900 | ITT CORPORATION DBA ITT STANDARD | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 512612090001 PIECE 2 | 6LE50 | FLUID HANDLING LLC | [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=4420013389731&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4420013389731
- 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/4420-01-338-9731/
JSON: https://nsnexplorer.com/api/nsn/4420-01-338-9731.json