The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-00-360-2113, 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 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4420-00-360-2113 |
| Primary Part Number | 8508638 |
| Item Name | Core Assembly,fluid Cooler |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | General Motors Corp |
| Status | ACTIVE |
| Core Width | 7.563 INCHES NOMINAL IN |
| Effective Heat Transfer Surface Area | 31.8 SQUARE FEET |
| Core Height | 12.438 INCHES NOMINAL IN |
| Material Document and Classification | MIL-C-15726,SHIPS,COMP 70-30 MIL SPEC ALL MATERIAL RESPONSES TUBES |
| Tube Quantity | 48 |
| Tube Attachment Method | SOLDERED BOTH ENDS |
| Core Length | 20.000 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | B TYPE |
| Material | COPPER AND NICKEL 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 |
|---|---|
| 8508638 | General Motors Corp (USA) |
| Reference | Meaning |
|---|---|
| N21394PC4 | 5/9 Secondary reference General Motors Corp |
| MILC15730TYPEB | 4/1 Identification reference U.S. Government activity |
| N21394PC4 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
| 8508638 | 3/9 Design control — primary reference General Motors Corp Harrison Radiator Div |
NSN 4420-00-360-2113 is a Core Assembly,fluid Cooler, manufactured by General Motors Corp, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-00-360-2113 has 1 manufacturer part number on file: 8508638 (General Motors Corp).
1 possible match (shared part number, not a government interchangeability claim): 4420-00-969-0984. Verify interchangeability with system specifications before substitution.
Key specifications for 8508638: Core Width: 7.563 INCHES NOMINAL IN; Effective Heat Transfer Surface Area: 31.8 SQUARE FEET; Core Height: 12.438 INCHES NOMINAL IN; Material Document and Classification: MIL-C-15726,SHIPS,COMP 70-30 MIL SPEC ALL MATERIAL RESPONSES TUBES. 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.