The Environmental Control System, cataloged under National Stock Number 4120-01-586-2771, is classified within Federal Supply Class 4120 (Air Conditioning Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is Applied Companies. Government technical data includes 9 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4120-01-586-2771 |
| Primary Part Number | AC436-120 |
| Item Name | Environmental Control System |
| FSC / FSG | 4120 / 41 — Air Conditioning Equipment |
| Manufacturer | Applied Companies |
| Status | ACTIVE |
| Relationship to Similar Equipment | SIMILAT TO,BUT NOT MECHANICALLY:AN/MSQ-140 |
| Unpackaged Unit Length | 132.000 INCHES NOMINAL IN |
| Joint Electronics Type Designation System Item Type Number | AN/MSQ-146 |
| Security Classification | UNCLASSIFIED |
| Unpackaged Unit Width | 86.000 INCHES NOMINAL IN |
| Joint Electronics Type Designation System Item Name | ENVIRONMENTAL CONTROL SYSTEM |
| Unpackaged Unit Height | 70.000 INCHES NOMINAL IN |
| Functional Description | THE ENVIRONMENTAL CONTROL SYSTEM IS CAPABLE OF RECIRCULATING CONDITIONED AIR WITHIN A SHELTER WITH BUILT-IN LOGIC FOR REDUNDANT OPERATION |
| Unpackaged Unit Weight | 2660.000 POUNDS LBS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AC436-120 PRIMARY | Applied Companies (USA) |
| Reference | Meaning |
|---|---|
| AN/MSQ-146 | 5/2 Secondary reference U.S. Government activity |
NSN 4120-01-586-2771 is a Environmental Control System, manufactured by Applied Companies, classified under FSC 4120, Air Conditioning Equipment. Status: active.
NSN 4120-01-586-2771 has 1 manufacturer part number on file: AC436-120 (Applied Companies).
Key specifications for AC436-120: Relationship to Similar Equipment: SIMILAT TO,BUT NOT MECHANICALLY:AN/MSQ-140; Unpackaged Unit Length: 132.000 INCHES NOMINAL IN; Joint Electronics Type Designation System Item Type Number: AN/MSQ-146; Security Classification: UNCLASSIFIED. 9 specifications are documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 4120-01-586-2771 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
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.