# NSN 4420-01-504-5631: Core Assembly, Fluid Cooler

NSN 4420-01-504-5631 (also written 4420015045631; NIIN 01-504-5631) is a core assembly, fluid cooler in Federal Supply Class 4420, Heat Exchangers and Steam Condensers. 6 manufacturer part numbers from 2 suppliers are on record. No purchases are on record yet.

## Identification

- NSN: 4420-01-504-5631 (4420015045631)
- NIIN: 01-504-5631 (015045631)
- 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 P: the government does not own the rights to the data needed for more sources. (observed 2026-10-10)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AGAV | END ITEM IDENTIFICATION | PF50 MDE JACKET WATER COOLER |
| AKMH | CORE DIAMETER | INCHES NOMINAL 48.000 |
| AKMJ | CORE LENGTH | INCHES NOMINAL 6.500 |
| AKMK | CORE WIDTH | INCHES NOMINAL 6.500 |
| ARNF | TUBE QUANTITY | 39 |
| ARPN | CORE HEIGHT | INCHES NOMINAL 26.125 |
| BRXN | HEAT TRANSFER METHOD | INDIRECT |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | PF50 PLATE PACK ASSEMBLY |
| FEAT | SPECIAL FEATURES | COLLOQUIAL NAME: CORE ASSEMBLY, FLUID COOLER; GASKETS ARE PERMANENTLY ADHERED TO THE HEAT TRANSFER AND END PLATES |
| MATT | MATERIAL | PLATES STEEL COMP 316 |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | PLATES ASSN STD SINGLE MATERIAL RESPONSE AISI316 |
| STYL | STYLE DESIGNATOR | — |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 4-592-21-039-061 | 51900 | ITT CORPORATION DBA ITT STANDARD | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 4-592-21-039-061 | 6LE50 | FLUID HANDLING LLC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 4-592-21-039-061 REV A | 51900 | ITT CORPORATION DBA ITT STANDARD | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 5-613-21-039-006 | 51900 | ITT CORPORATION DBA ITT STANDARD | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 5-613-21-039-006 PC NO 2 | 51900 | ITT CORPORATION DBA ITT STANDARD | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 5-613-21-039-006 PC NO 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=4420015045631&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4420015045631
- 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/4420-01-504-5631/
JSON: https://nsnexplorer.com/api/nsn/4420-01-504-5631.json