The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-01-320-2718, 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 Naval Sea Systems Command. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4420-01-320-2718 |
| Primary Part Number | 6309956-131 |
| Item Name | Core Assembly,fluid Cooler |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Style Designator | FINNED COILED TUBE |
| 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 |
|---|---|
| 6309956-131 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6309956 | D/9 Drawing number reference only Naval Sea Systems Command |
| K894810 | 3/9 Design control — primary reference Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc. |
| K894810 | C/1 Advisory reference — outside the item-of-supply concept Meggitt Defense Systems, Inc. Dba Meggitt Defense Systems Inc |
| K894810 | 5/9 Secondary reference Davey Compressor Co Div of Keco Industries Inc |
NSN 4420-01-320-2718 is a Core Assembly,fluid Cooler, manufactured by Naval Sea Systems Command, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-320-2718 has 1 manufacturer part number on file: 6309956-131 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-392-0371. Verify interchangeability with system specifications before substitution.
Key specifications for 6309956-131: Style Designator: FINNED COILED TUBE; Special Features: COOLER 1ST STAGE; End Item Identification: COMPRESSOR,PNEUMATIC HIGH-PRESSURE;3A4A7A2. 1 specification is 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.