The Heat Exchanger,liqu, cataloged under National Stock Number 4420-00-442-7580, 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 Honeywell Intl Inc Defense Avionics Systems Former Test Systems Div. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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,liqu |
| FSC / FSG | 4420 — Heat Exchangers and Steam Condensers (FSG 44) |
| Manufacturers | Honeywell Intl Inc Defense Avionics Systems Former Test Systems Div (CAGE 55974) |
| Parameter | Value |
|---|---|
| NSN | 4420-00-442-7580 |
| Primary Part Number | 1943919-1 |
| Item Name | Heat Exchanger,liqu |
| FSC / FSG | 4420 / 44 — Heat Exchangers and Steam Condensers |
| Manufacturer | Honeywell Intl Inc Defense Avionics Systems Former Test Systems Div |
| 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 |
|---|---|
| 1943919-1 PRIMARY | Honeywell Intl Inc Defense Avionics Systems Former Test Systems Div (USA) |
| Reference | Meaning |
|---|---|
| 1943919-1 | 5/9 Secondary reference Honeywell Intl Inc Defense Avionics Systems Former Bendix Navigation and Control Systems |
NSN 4420-00-442-7580 is a Heat Exchanger,liqu, manufactured by Honeywell Intl Inc Defense Avionics Systems Former Test Systems Div, classified under FSC 4420, Heat Exchangers and Steam Condensers. Status: active.
NSN 4420-00-442-7580 has 1 manufacturer part number on file: 1943919-1 (Honeywell Intl Inc Defense Avionics Systems Former Test Systems Div).
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.