The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-01-368-9898, 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. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-368-9898 |
| Primary Part Number | 4-591-70-905-044 |
| Item Name | Core Assembly,fluid Cooler |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Fluid Handling Llc |
| Status | ACTIVE |
| Core Width | 10.562 INCHES NOMINAL IN |
| Heat Transfer Method | INDIRECT |
| Core Height | 8.000 MILLIMETERS NOMINAL MM |
| Style Designator | PLATE, RECTANGULAR OR SQUARE |
| Core Length | 36.141 INCHES NOMINAL IN |
| Material | TITANIUM HOUSING |
| 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 |
|---|---|
| 4-591-70-905-044 PRIMARY | Fluid Handling Llc (USA) |
| Reference | Meaning |
|---|---|
| 4-591-70-905 | D/9 Drawing number reference only Itt Corporation Dba Itt Standard |
| 4-591-70-906-03 | C/1 Advisory reference — outside the item-of-supply concept Itt Corporation Dba Itt Standard |
| 4-591-70-906-03 | C/1 Advisory reference — outside the item-of-supply concept Fluid Handling Llc |
| 4-591-70-905 | D/9 Drawing number reference only Fluid Handling Llc |
| 4-591-70-905-044 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
NSN 4420-01-368-9898 is a Core Assembly,fluid Cooler, manufactured by Fluid Handling Llc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-368-9898 has 1 manufacturer part number on file: 4-591-70-905-044 (Fluid Handling Llc).
Key specifications for 4-591-70-905-044: Core Width: 10.562 INCHES NOMINAL IN; Heat Transfer Method: INDIRECT; Core Height: 8.000 MILLIMETERS NOMINAL MM; Style Designator: PLATE, RECTANGULAR OR SQUARE. 6 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.