The Heat Exchanger Assembly, cataloged under National Stock Number 5821-00-021-4913, is classified within Federal Supply Class 5821 (Radio and Television Communication Equipment, Airborne) of the Communication, Detection, and Coherent Radiation Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5821-00-021-4913 |
| Item Name | Heat Exchanger Assembly |
| FSC / FSG | 5821 / 58 — Radio and Television Communication Equipment, Airborne |
| Status | ACTIVE |
| FSC Application Data | RADIO AND TELEVISION COMMUNICATION EQUIPMENT,AIRBORNE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 549-3696-003 | 5/9 Secondary reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| 549-3696-003 | 3/2 Design control — primary reference U.S. Government activity |
| 549-3696-003 | 5/9 Secondary reference Lockhart Industries Inc |
NSN 5821-00-021-4913 is a Heat Exchanger Assembly, classified under FSC 5821, Radio and Television Communication Equipment, Airborne. Status: active.
Key specifications for 5821-00-021-4913: FSC Application Data: RADIO AND TELEVISION COMMUNICATION EQUIPMENT,AIRBORNE. 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.