The Cooler,fluid,industrial, cataloged under National Stock Number 4420-00-254-4686, is classified within Federal Supply Class 4420 (Heat Exchangers and Steam Condensers) of the Furnace, Steam, Drying, Nuclear Reactors group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4420-00-254-4686 |
| Item Name | Cooler,fluid,industrial |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Status | ACTIVE |
| Heat Transfer Method | INDIRECT |
| Effective Heat Transfer Surface Area | 154.0 SQUARE FEET |
| Tube Quantity | 262 |
| Tube Attachment Method | EXPANDED BOTH ENDS |
| Tubing Outside Diameter | 0.375 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Nondefinitive Spec/std Data | A TYPE AND 1 CLASS |
| Material | COPPER ALLOY SHELL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| S4501-3128502 | 5/2 Secondary reference U.S. Government activity |
| MILC15730TYPEACLASS1 | 4/1 Identification reference U.S. Government activity |
| 4M1072A3 | 3/9 Design control — primary reference Howden Buffalo, Inc Div Howden Gyrol Fluid Drives |
| S4501D3128502 | 5/2 Secondary reference U.S. Government activity |
NSN 4420-00-254-4686 is a Cooler,fluid,industrial, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4420-00-269-0819, 4420-00-360-2453. Verify interchangeability with system specifications before substitution.
Key specifications for 4420-00-254-4686: Heat Transfer Method: INDIRECT; Effective Heat Transfer Surface Area: 154.0 SQUARE FEET; Tube Quantity: 262; Tube Attachment Method: EXPANDED BOTH ENDS. 7 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.
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.