The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-01-339-3574, is classified within Federal Supply Class 4420 (Heat Exchangers and Steam Condensers) of the Furnace, Steam, Drying, Nuclear Reactors group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-339-3574 |
| 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 | 245.0 SQUARE FEET |
| Style Designator | STRAIGHT FINNED TUBE, CYLINDRICAL |
| Material Document and Classification | ASTM B359 ASSN STD SINGLE MATERIAL RESPONSE TUBES |
| Tube Quantity | 236 |
| Material Thickness | 0.044 INCHES MINIMUM IN |
| Core Length | 41.875 INCHES NOMINAL IN |
| Tubing Outside Diameter | 0.500 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 |
|---|---|
| 4-116-12-042-001 | C/1 Advisory reference — outside the item-of-supply concept Fluid Handling Llc |
| 512612042001 PIECE 2 | 5/9 Secondary reference Itt Corporation Dba Itt Standard |
| 4-116-12-042-001 | 3/9 Design control — primary reference Itt Corporation Dba Itt Standard |
| 512612042001 PIECE 2 | C/1 Advisory reference — outside the item-of-supply concept Fluid Handling Llc |
NSN 4420-01-339-3574 is a Core Assembly,fluid Cooler, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
Key specifications for 4420-01-339-3574: Heat Transfer Method: INDIRECT; Effective Heat Transfer Surface Area: 245.0 SQUARE FEET; Style Designator: STRAIGHT FINNED TUBE, CYLINDRICAL; Material Document and Classification: ASTM B359 ASSN STD SINGLE MATERIAL RESPONSE TUBES. 9 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.