The Environmental Control System, cataloged under National Stock Number 4120-01-551-9191, is classified within Federal Supply Class 4120 (Air Conditioning Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is Hdt Expeditionary Systems Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4120-01-551-9191 |
| Primary Part Number | KS4853CAAFHMX |
| Item Name | Environmental Control System |
| FSC / FSG | 4120 / 41 — Air Conditioning Equipment |
| Manufacturer | Hdt Expeditionary Systems Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| KS4853CAAFHMX PRIMARY | Hdt Expeditionary Systems Inc (USA) |
| 12443857-001 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 2K48AF6AH-MIL | 5/9 Secondary reference Hdt Expeditionary Systems Inc |
| 86301-477 | 5/9 Secondary reference U.S. Government activity |
NSN 4120-01-551-9191 is a Environmental Control System, manufactured by Hdt Expeditionary Systems Inc, classified under FSC 4120, Air Conditioning Equipment. Status: active.
NSN 4120-01-551-9191 has 2 manufacturer part numbers on file: KS4853CAAFHMX (Hdt Expeditionary Systems Inc), 12443857-001 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for KS4853CAAFHMX: Special Features: 48K BTU COOLING/20K BTU HEATING,208-230VAC,3PHASE,50/60HZ,R134A CHARGE 10LB 8OZ (168 OUNCES) VAC; End Item Identification: FAMILY OF MEDIUM TACTICAL VEHICLES (FMTV),5TON. 0 specifications are 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.