The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-01-505-2364, 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 Hayden Inc. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-505-2364 |
| Primary Part Number | 028885 |
| Item Name | Core Assembly,fluid Cooler |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Hayden Inc |
| Status | ACTIVE |
| Core Width | 32.000 INCHES NOMINAL IN |
| Heat Transfer Method | INDIRECT |
| Style Designator | FINNED PLATE, RECTANGULAR |
| Core Length | 22.750 INCHES NOMINAL IN |
| Material | ALUMINUM AND COPPER TUBES |
| 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 |
|---|---|
| 028885 PRIMARY | Hayden Inc (USA) |
| 028541 ITEM 3 | Hayden Inc (USA) |
| Reference | Meaning |
|---|---|
| 028541 | D/9 Drawing number reference only Hayden Inc |
NSN 4420-01-505-2364 is a Core Assembly,fluid Cooler, manufactured by Hayden Inc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-505-2364 has 2 manufacturer part numbers on file: 028885 (Hayden Inc), 028541 ITEM 3 (Hayden Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4420-01-505-2392, 4140-01-569-0734. Verify interchangeability with system specifications before substitution.
Key specifications for 028885: Core Width: 32.000 INCHES NOMINAL IN; Heat Transfer Method: INDIRECT; Style Designator: FINNED PLATE, RECTANGULAR; Core Length: 22.750 INCHES NOMINAL IN. 5 specifications are documented in the U.S. Government catalog.
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.