The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-01-320-8356, 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 3 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-320-8356 |
| Primary Part Number | 6309908-134 |
| Item Name | Core Assembly,fluid Cooler |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Tube Quantity | 1 |
| Tubing Outside Diameter | 5.000 INCHES NOMINAL BOTH INLET AND OUTLET TUBE ENDS IN |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| 6309908-134 | Naval Sea Systems Command (USA) |
| 6309908-134 | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA) |
| Reference | Meaning |
|---|---|
| 6309908 | D/9 Drawing number reference only Naval Sea Systems Command |
| 11282720 | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
| 11282720 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| 11282720 | 5/9 Secondary reference U.S. Government activity |
NSN 4420-01-320-8356 is a Core Assembly,fluid Cooler, manufactured by Naval Sea Systems Command, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-320-8356 has 2 manufacturer part numbers on file: 6309908-134 (Naval Sea Systems Command), 6309908-134 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)).
7 possible matches (shared part number, not a government interchangeability claim): 4710-01-320-8556, 4820-01-321-5359, 4730-01-321-6285. Verify interchangeability with system specifications before substitution.
Key specifications for 6309908-134: Tube Quantity: 1; Tubing Outside Diameter: 5.000 INCHES NOMINAL BOTH INLET AND OUTLET TUBE ENDS IN; Special Features: INCLUDES NUT AND FERRULE;USED ON THE THIRD STAGE SEPARATOR;FINNED TUBE; End Item Identification: COMPRESSOR,PNEUMATIC,HIGH PRESSURE (3A4A7A2). 3 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.