The Heat Exchanger,fluid to Air, cataloged under National Stock Number 4420-01-681-8290, 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 Exergy, Llc Dba Exergy Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Heat Exchanger,fluid to Air |
| FSC / FSG | 4420 — Heat Exchangers and Steam Condensers (FSG 44) |
| Manufacturers | Exergy, Llc Dba Exergy Llc (CAGE 0NEZ1) |
| Parameter | Value |
|---|---|
| NSN | 4420-01-681-8290 |
| Primary Part Number | 03633-1 |
| Item Name | Heat Exchanger,fluid to Air |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Exergy, Llc Dba Exergy Llc |
| 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 |
|---|---|
| 03633-1 PRIMARY | Exergy, Llc Dba Exergy Llc (USA) |
| Reference | Meaning |
|---|---|
| NV1028190 FIND NO 63 | C/1 Advisory reference — outside the item-of-supply concept Hamilton Sundstrand Corporation Dba Collins Aerospace |
NSN 4420-01-681-8290 is a Heat Exchanger,fluid to Air, manufactured by Exergy, Llc Dba Exergy Llc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-681-8290 has 1 manufacturer part number on file: 03633-1 (Exergy, Llc Dba Exergy Llc).
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.