The Cooler,fluid,industrial, cataloged under National Stock Number 4420-01-660-7331, 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 Corporation Div Rms - Manassas. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4420-01-660-7331 |
| Primary Part Number | N165440-1 |
| Item Name | Cooler,fluid,industrial |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Lockheed Martin Corporation Div Rms - Manassas |
| Status | ACTIVE |
| Criticality Code Justification | FEAT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| N165440-1 PRIMARY | Lockheed Martin Corporation Div Rms - Manassas (USA) |
NSN 4420-01-660-7331 is a Cooler,fluid,industrial, manufactured by Lockheed Martin Corporation Div Rms - Manassas, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-01-660-7331 has 1 manufacturer part number on file: N165440-1 (Lockheed Martin Corporation Div Rms - Manassas).
Key specifications for N165440-1: Criticality Code Justification: FEAT; Special Features: A PART,ASSEMBLY,OR SYSTEM IDENTIFIED AS ESSENTIAL TO WEAPON SYSTEM PERFORMANCE OR OPERATION TO PRESERVE LIFE AND SAFETY OF PERSONNEL; End Item Identification: AN/BQQ-10(V)3 UNIT 4114 TI16,PSAPC SSBN. 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.