The Core Assembly,fluid Cooler, cataloged under National Stock Number 4420-01-587-9751, 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 Alfa Laval Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4420-01-587-9751 |
| Primary Part Number | 3770170076 |
| Item Name | Core Assembly,fluid Cooler |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Alfa Laval Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 331-8417740 ITEM 27 | Naval Sea Systems Command (USA) |
| 3770170076 PRIMARY | Alfa Laval Inc (USA) |
| Reference | Meaning |
|---|---|
| 377017-0096 | 5/9 Secondary reference Alfa Laval Inc |
| 3770170097 | 5/9 Secondary reference Alfa Laval Inc |
| 8417740 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4420-01-587-9751 is a Core Assembly,fluid Cooler, manufactured by Alfa Laval Inc, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-587-9751 has 2 manufacturer part numbers on file: 331-8417740 ITEM 27 (Naval Sea Systems Command), 3770170076 (Alfa Laval Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5330-01-587-9757, 5330-01-587-9759. Verify interchangeability with system specifications before substitution.
Key specifications for 3770170076: Part Name Assigned by Controlling Agency: END CASSETTE 2, 0.6MM, HT MM; End Item Identification: 4420-01-587-9278 LSD-41 CLASS SSDG LUBE OIL COOLER. 0 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.