The Core Assembly,fluid Heater,indus, cataloged under National Stock Number 4420-01-664-9726, 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 Birdon America Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Core Assembly,fluid Heater,indus |
| FSC / FSG | 4420 — Heat Exchangers and Steam Condensers (FSG 44) |
| Manufacturers | Birdon America Inc (CAGE 6KT72) |
| Parameter | Value |
|---|---|
| NSN | 4420-01-664-9726 |
| Primary Part Number | B0000506 |
| Item Name | Core Assembly,fluid Heater,indus |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Birdon America 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 |
|---|---|
| B0000506 PRIMARY | Birdon America Inc (USA) |
| Reference | Meaning |
|---|---|
| 12621166 | 5/9 Secondary reference Birdon America Inc |
NSN 4420-01-664-9726 is a Core Assembly,fluid Heater,indus, manufactured by Birdon America Inc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-664-9726 has 1 manufacturer part number on file: B0000506 (Birdon America Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5935-01-665-3415, 5315-01-665-4166. 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.