The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-00-787-2578, is classified within Federal Supply Class 4420 (Heat Exchangers and Steam Condensers) of the Furnace, Steam, Drying, Nuclear Reactors group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-00-787-2578 |
| Item Name | Core Assembly,fluid Cooler |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Status | ACTIVE |
| Heat Transfer Method | INDIRECT |
| Effective Heat Transfer Surface Area | 149.7 SQUARE FEET |
| Style Designator | STRAIGHT PLAIN TUBE, CYLINDRICAL |
| Core Diameter | 12.000 INCHES NOMINAL IN |
| Tube Quantity | 114 |
| Tube Attachment Method | EXPANDED BOTH ENDS |
| Material Thickness | 0.065 INCHES NOMINAL IN |
| Core Length | 96.000 INCHES NOMINAL IN |
| Tubing Outside Diameter | 0.625 INCHES NOMINAL BOTH INLET AND OUTLET TUBE ENDS IN |
| Material | COPPER ALLOY TUBES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 2M1008B34 | 3/9 Design control — primary reference Howden Buffalo, Inc Div Howden Gyrol Fluid Drives |
| 2M1008B34 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
| 2M1008B34 | C/1 Advisory reference — outside the item-of-supply concept Fluid Handling Llc |
NSN 4420-00-787-2578 is a Core Assembly,fluid Cooler, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
Key specifications for 4420-00-787-2578: Heat Transfer Method: INDIRECT; Effective Heat Transfer Surface Area: 149.7 SQUARE FEET; Style Designator: STRAIGHT PLAIN TUBE, CYLINDRICAL; Core Diameter: 12.000 INCHES NOMINAL IN. 10 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.