The Core Assy, cataloged under National Stock Number 4420-01-453-0865, 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 Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Core Assy |
| FSC / FSG | 4420 — Heat Exchangers and Steam Condensers (FSG 44) |
| Manufacturers | Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc (CAGE 0ASU6) |
| Parameter | Value |
|---|---|
| NSN | 4420-01-453-0865 |
| Primary Part Number | 004634-01 |
| Item Name | Core Assy |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 004634-01 PRIMARY | Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc (USA) |
| Reference | Meaning |
|---|---|
| 004629 | D/9 Drawing number reference only Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc |
| 004635-01 | C/1 Advisory reference — outside the item-of-supply concept Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc |
NSN 4420-01-453-0865 is a Core Assy, manufactured by Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-453-0865 has 1 manufacturer part number on file: 004634-01 (Industrial Heat Transfer, Inc. Dba Industrial Heat Transfer Inc).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-601-2484. Verify interchangeability with system specifications before substitution.
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.