The Heat Exchanger, cataloged under National Stock Number 4420-00-079-0168, 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 Lockheed Martin Librascope Corporation. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Heat Exchanger |
| FSC / FSG | 4420 — Heat Exchangers and Steam Condensers (FSG 44) |
| Manufacturers | Lockheed Martin Librascope Corporation (CAGE 36090) |
| Parameter | Value |
|---|---|
| NSN | 4420-00-079-0168 |
| Primary Part Number | L200021412 |
| Item Name | Heat Exchanger |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Lockheed Martin Librascope Corporation |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| L200021412 PRIMARY | Lockheed Martin Librascope Corporation (USA) |
| BUWEPSDWG2678101 PRIMARY | Lockheed Martin Librascope Corporation (USA) |
| Reference | Meaning |
|---|---|
| 2678101 | 7/2 Vendor item drawing reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 4420-00-079-0168 is a Heat Exchanger, manufactured by Lockheed Martin Librascope Corporation, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-00-079-0168 has 2 manufacturer part numbers on file: L200021412 (Lockheed Martin Librascope Corporation), BUWEPSDWG2678101 (Lockheed Martin Librascope Corporation).
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.