The Cooler,fluid,industrial, cataloged under National Stock Number 4420-01-186-3077, 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 Caterpillar Inc Div Caterpillar Defense. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-186-3077 |
| Primary Part Number | 6L4074 |
| Item Name | Cooler,fluid,industrial |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Heat Transfer Method | INDIRECT |
| Length | 24.000 INCHES NOMINAL IN |
| Style Designator | STRAIGHT PLAIN TUBE CYLINDRICAL |
| Diameter | 5.000 INCHES NOMINAL IN |
| Tube Quantity | 80 |
| Tubing Outside Diameter | 0.375 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Cubic Measure | 2.000 CUBIC FEET |
| Material | STEEL SHELL |
| Material | COPPER ALLOY TUBES |
| 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 |
|---|---|
| 6L4074 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 1S14269 | 5/9 Secondary reference Caterpillar Inc Div Caterpillar Defense |
| X513800J79 | 5/9 Secondary reference Caterpillar Inc Div Caterpillar Defense |
NSN 4420-01-186-3077 is a Cooler,fluid,industrial, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-186-3077 has 1 manufacturer part number on file: 6L4074 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 6L4074: Heat Transfer Method: INDIRECT; Length: 24.000 INCHES NOMINAL IN; Style Designator: STRAIGHT PLAIN TUBE CYLINDRICAL; Diameter: 5.000 INCHES NOMINAL IN. 9 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.