The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-01-239-1200, 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 Xchanger Manufacturing Corporation Dba Xchanger Manufacturing Corp. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4420-01-239-1200 |
| Primary Part Number | D-1284 |
| Item Name | Core Assembly,fluid Cooler |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Xchanger Manufacturing Corporation Dba Xchanger Manufacturing Corp |
| Status | ACTIVE |
| Heat Transfer Method | INDIRECT |
| Style Designator | FINNED "U" TUBE |
| Core Diameter | 4.750 INCHES NOMINAL IN |
| Tube Quantity | 16 |
| Core Length | 21.375 INCHES NOMINAL IN |
| Material | BRASS OVERALL |
| 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 |
|---|---|
| E-942 FIND 3 | Xchanger Manufacturing Corporation Dba Xchanger Manufacturing Corp (USA) |
| D-1284 PRIMARY | Xchanger Manufacturing Corporation Dba Xchanger Manufacturing Corp (USA) |
| Reference | Meaning |
|---|---|
| E-942 | D/9 Drawing number reference only Xchanger Manufacturing Corporation Dba Xchanger Manufacturing Corp |
NSN 4420-01-239-1200 is a Core Assembly,fluid Cooler, manufactured by Xchanger Manufacturing Corporation Dba Xchanger Manufacturing Corp, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-239-1200 has 2 manufacturer part numbers on file: E-942 FIND 3 (Xchanger Manufacturing Corporation Dba Xchanger Manufacturing Corp), D-1284 (Xchanger Manufacturing Corporation Dba Xchanger Manufacturing Corp).
1 possible match (shared part number, not a government interchangeability claim): 6105-01-371-8200. Verify interchangeability with system specifications before substitution.
Key specifications for D-1284: Heat Transfer Method: INDIRECT; Style Designator: FINNED "U" TUBE; Core Diameter: 4.750 INCHES NOMINAL IN; Tube Quantity: 16. 6 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.