The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-00-360-2117, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-00-360-2117 |
| Primary Part Number | 8506720 |
| Item Name | Core Assembly,fluid Cooler |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | General Motors Corp |
| Status | ACTIVE |
| Core Width | 8.906 INCHES NOMINAL IN |
| Effective Heat Transfer Surface Area | 5.4 SQUARE FEET |
| Core Height | 3.875 INCHES NOMINAL IN |
| Material Document and Classification | MIL-C-15726,COMP 70-30 MIL SPEC SINGLE MATERIAL RESPONSE TUBES |
| Tube Quantity | 12 |
| Tube Attachment Method | BRAZED BOTH ENDS |
| Core Length | 12.313 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | B TYPE |
| 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 |
|---|---|
| 8506720 | General Motors Corp (USA) |
| Reference | Meaning |
|---|---|
| MILC15730TYPEB | 4/1 Identification reference U.S. Government activity |
| 8506720 | 3/9 Design control — primary reference General Motors Corp Harrison Radiator Div |
NSN 4420-00-360-2117 is a Core Assembly,fluid Cooler, manufactured by General Motors Corp, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-00-360-2117 has 1 manufacturer part number on file: 8506720 (General Motors Corp).
Key specifications for 8506720: Core Width: 8.906 INCHES NOMINAL IN; Effective Heat Transfer Surface Area: 5.4 SQUARE FEET; Core Height: 3.875 INCHES NOMINAL IN; Material Document and Classification: MIL-C-15726,COMP 70-30 MIL SPEC SINGLE MATERIAL RESPONSE 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.