The Cooler,fluid,industrial, cataloged under National Stock Number 4420-01-499-2106, 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 Rotron Incorporated. Government technical data includes 4 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4420-01-499-2106 |
| Primary Part Number | 1636-04 |
| Item Name | Cooler,fluid,industrial |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Rotron Incorporated |
| Status | ACTIVE |
| Length | 17.000 INCHES NOMINAL IN |
| Style Designator | PLAIN U-TUBE |
| Height | 4.380 INCHES NOMINAL IN |
| Width | 10.000 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1636-04 PRIMARY | Rotron Incorporated (USA) |
| Reference | Meaning |
|---|---|
| 1636-02 | D/9 Drawing number reference only Rotron Incorporated |
| 1636-02 ITEM 1 | 5/2 Secondary reference U.S. Government activity |
NSN 4420-01-499-2106 is a Cooler,fluid,industrial, manufactured by Rotron Incorporated, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-499-2106 has 1 manufacturer part number on file: 1636-04 (Rotron Incorporated).
1 possible match (shared part number, not a government interchangeability claim): 4140-01-499-4151. Verify interchangeability with system specifications before substitution.
Key specifications for 1636-04: Length: 17.000 INCHES NOMINAL IN; Style Designator: PLAIN U-TUBE; Height: 4.380 INCHES NOMINAL IN; Special Features: BRAZE JOINTS, IAW MIL-B-007883C,GRADEB; NHA 1636-02. 4 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.
NSN 4420-01-499-2106 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.