The Air Conditioner, cataloged under National Stock Number 4120-01-552-5689, is classified within Federal Supply Class 4120 (Air Conditioning Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is Melcor Corporation. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4120-01-552-5689 |
| Primary Part Number | MAA555T-115 |
| Item Name | Air Conditioner |
| FSC / FSG | 4120 / 41 — Air Conditioning Equipment |
| Manufacturer | Melcor Corporation |
| Status | ACTIVE |
| Current Type | AC |
| Cooling Capacity in Btu Per Hour | 555.0 NOMINAL |
| Usage Design | TELECOM, MEDICAL, INDUSTRIAL AND COMMERCIAL ENCLOSURES |
| Voltage Rating | 115.0 VOLTS NOMINAL |
| 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 |
|---|---|
| MAA555T-115 PRIMARY | Melcor Corporation (USA) |
| Reference | Meaning |
|---|---|
| 16213300 PC2 | 5/9 Secondary reference Gulf Coast Holdings, Inc Dba Unidynamics |
| 16213300 PC2 | 5/2 Secondary reference U.S. Government activity |
NSN 4120-01-552-5689 is a Air Conditioner, manufactured by Melcor Corporation, classified under FSC 4120, Air Conditioning Equipment. Status: active.
NSN 4120-01-552-5689 has 1 manufacturer part number on file: MAA555T-115 (Melcor Corporation).
Key specifications for MAA555T-115: Current Type: AC; Cooling Capacity in Btu Per Hour: 555.0 NOMINAL; Special Features: MFG NAME: THRU MOUNT THERMOELECTRIC AIR CONDITIONER NEMA 4X; End Item Identification: CONTROLLER, HOIST TROLLEY OVERHEAD CRANE LM-LCS LRHR 16213300-1 NEXT ASSY 16211000-1 USED ON 1621. 4 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.