The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-01-185-4449, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4420-01-185-4449 |
| Primary Part Number | 5-131-15-078-001 PIECE 2 |
| 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 |
|---|---|
| 4-366-15-078-001 | Fluid Handling Llc (USA) |
| 5-131-15-078-001 PIECE 2 PRIMARY | Fluid Handling Llc (USA) |
| Reference | Meaning |
|---|---|
| 5-131-15-078-001 | D/9 Drawing number reference only Fluid Handling Llc |
| 5-131-15-078-001 PIECE 2 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
| 4-366-15-078-001 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
| 5-131-15-078-001 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
NSN 4420-01-185-4449 is a Core Assembly,fluid Cooler, manufactured by Fluid Handling Llc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-185-4449 has 2 manufacturer part numbers on file: 4-366-15-078-001 (Fluid Handling Llc), 5-131-15-078-001 PIECE 2 (Fluid Handling Llc).
1 possible match (shared part number, not a government interchangeability claim): 4420-01-185-8271. 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.