The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-00-142-1347, 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 General Motors Corp. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-00-142-1347 |
| Primary Part Number | 8521168 |
| Item Name | Core Assembly,fluid Cooler |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | General Motors Corp |
| Status | ACTIVE |
| Core Width | 7.280 INCHES NOMINAL IN |
| Heat Transfer Method | INDIRECT |
| Effective Heat Transfer Surface Area | 33.0 SQUARE FEET |
| Style Designator | STRAIGHT FINNED TUBE, RECTANGULAR |
| Material Document and Classification | MIL-C-15726,COMP 70-30 MIL SPEC SINGLE MATERIAL RESPONSE TUBES |
| Tube Quantity | 48 |
| Core Length | 66.620 INCHES NOMINAL IN |
| Tubing Outside Diameter | 0.625 INCHES NOMINAL BOTH INLET AND OUTLET TUBE ENDS IN |
| Core Thickness | 25.440 INCHES NOMINAL IN |
| 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 |
|---|---|
| D8521168 | General Motors Llc Dba General Motors Llc (USA) |
| E8521072PC32 | General Motors Llc Dba General Motors Llc (USA) |
| 8521168 PRIMARY | General Motors Corp (USA) |
| Reference | Meaning |
|---|---|
| 8521168 | 5/9 Secondary reference General Motors Corp Harrison Radiator Div |
| E8521072PC32 | 5/9 Secondary reference General Motors Corp |
| D8521168 | 5/9 Secondary reference General Motors Corp |
| D8521168 | 5/9 Secondary reference General Motors Corp Harrison Radiator Div |
| E8521072PC32 | 5/9 Secondary reference General Motors Corp Harrison Radiator Div |
| D3177231 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4420-00-142-1347 is a Core Assembly,fluid Cooler, manufactured by General Motors Corp, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-00-142-1347 has 3 manufacturer part numbers on file: D8521168 (General Motors Llc Dba General Motors Llc), E8521072PC32 (General Motors Llc Dba General Motors Llc), 8521168 (General Motors Corp).
Key specifications for 8521168: Core Width: 7.280 INCHES NOMINAL IN; Heat Transfer Method: INDIRECT; Effective Heat Transfer Surface Area: 33.0 SQUARE FEET; Style Designator: STRAIGHT FINNED TUBE, RECTANGULAR. 10 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.