The Cooler,fluid,industrial, cataloged under National Stock Number 4420-01-209-0442, 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 Aqua-Chem, Inc. Dba Aqua-Chem Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-209-0442 |
| Primary Part Number | 101639-61 |
| Item Name | Cooler,fluid,industrial |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Aqua-Chem, Inc. Dba Aqua-Chem Inc |
| Status | ACTIVE |
| Length | 72.000 INCHES NOMINAL IN |
| 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 |
|---|---|
| 101639-61 PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| Reference | Meaning |
|---|---|
| 101639-61 | 3/9 Design control — primary reference Aqua-Chem, Inc. |
| 5-28124 | D/9 Drawing number reference only Aqua-Chem, Inc. |
| 005-28124-061 | 5/9 Secondary reference Aqua-Chem, Inc. |
| 5-28124-61 | 5/9 Secondary reference Aqua-Chem, Inc. |
NSN 4420-01-209-0442 is a Cooler,fluid,industrial, manufactured by Aqua-Chem, Inc. Dba Aqua-Chem Inc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-209-0442 has 1 manufacturer part number on file: 101639-61 (Aqua-Chem, Inc. Dba Aqua-Chem Inc).
Key specifications for 101639-61: Length: 72.000 INCHES NOMINAL IN. 1 specification is 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.