The Core Assembly,fluid Heater,indus, cataloged under National Stock Number 4420-01-169-9778, 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9 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-169-9778 |
| Item Name | Core Assembly,fluid Heater,indus |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Status | ACTIVE |
| Heat Transfer Method | DIRECT |
| Style Designator | PLAIN "U" TUBE |
| Material Document and Classification | MIL-H-17428A MIL SPEC ALL MATERIAL RESPONSES OVERALL A |
| Core Diameter | 4.947 INCHES NOMINAL IN |
| Tube Quantity | 36 |
| Tube Attachment Method | WELDED BOTH ENDS |
| Core Length | 65.125 INCHES NOMINAL IN |
| Tubing Outside Diameter | 0.375 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| 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 |
|---|---|
| 153-003-E-093-03 | 3/9 Design control — primary reference Beaird Industries Inc. |
| 53-03-E-093-03 | 5/9 Secondary reference Beaird Industries Inc. |
| 153-003-E-093 | 5/9 Secondary reference Beaird Industries Inc. |
NSN 4420-01-169-9778 is a Core Assembly,fluid Heater,indus, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
Key specifications for 4420-01-169-9778: Heat Transfer Method: DIRECT; Style Designator: PLAIN "U" TUBE; Material Document and Classification: MIL-H-17428A MIL SPEC ALL MATERIAL RESPONSES OVERALL A; Core Diameter: 4.947 INCHES NOMINAL IN. 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.