The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-01-368-7665, is classified within Federal Supply Class 4420 (Heat Exchangers and Steam Condensers) of the Furnace, Steam, Drying, Nuclear Reactors group. The manufacturer of record is Fluid Handling Llc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Core Assembly,fluid Cooler |
| FSC / FSG | 4420 — Heat Exchangers and Steam Condensers (FSG 44) |
| Manufacturers | Fluid Handling Llc (CAGE 6LE50) |
| Parameter | Value |
|---|---|
| NSN | 4420-01-368-7665 |
| Primary Part Number | 4-591-70-905-33 |
| Item Name | Core Assembly,fluid Cooler |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Fluid Handling Llc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4-592-10-039-002 ITEM 3 | Fluid Handling Llc (USA) |
| 4-591-70-905-33 PRIMARY | Fluid Handling Llc (USA) |
| Reference | Meaning |
|---|---|
| 4-591-70-905-03 | C/1 Advisory reference — outside the item-of-supply concept Itt Corporation Dba Itt Standard |
| 4-591-70-905 | D/9 Drawing number reference only Itt Corporation Dba Itt Standard |
| 4-591-70-905 | D/9 Drawing number reference only Fluid Handling Llc |
| 4-591-70-905-33 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
| 4-592-10-039-002 ITEM 3 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
| 4-591-70-905-03 | C/1 Advisory reference — outside the item-of-supply concept Fluid Handling Llc |
NSN 4420-01-368-7665 is a Core Assembly,fluid Cooler, manufactured by Fluid Handling Llc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-368-7665 has 2 manufacturer part numbers on file: 4-592-10-039-002 ITEM 3 (Fluid Handling Llc), 4-591-70-905-33 (Fluid Handling Llc).
3 possible matches (shared part number, not a government interchangeability claim): 4420-01-368-9896, 4420-01-368-9897, 4420-01-368-9898. Verify interchangeability with system specifications before substitution.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.