The Collar,air Conditioning-Heating, cataloged under National Stock Number 4520-01-603-6536, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Army, United States Department of the Dba Diorectorate of Production Engineering Div Tobyhanna Army Depot. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4520-01-603-6536 |
| Primary Part Number | A1-44038D |
| Item Name | Collar,air Conditioning-Heating |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Army, United States Department of the Dba Diorectorate of Production Engineering Div Tobyhanna Army Depot |
| Status | ACTIVE |
| Fitting Inside Diameter | 12.000 INCHES NOMINAL IN |
| Style Designator | ROUND |
| 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 |
|---|---|
| A1-44038D PRIMARY | Army, United States Department of the Dba Diorectorate of Production Engineering Div Tobyhanna Army Depot (USA) |
| Reference | Meaning |
|---|---|
| 200925177-01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4520-01-603-6536 is a Collar,air Conditioning-Heating, manufactured by Army, United States Department of the Dba Diorectorate of Production Engineering Div Tobyhanna Army Depot, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-603-6536 has 1 manufacturer part number on file: A1-44038D (Army, United States Department of the Dba Diorectorate of Production Engineering Div Tobyhanna Army Depot).
Key specifications for A1-44038D: Fitting Inside Diameter: 12.000 INCHES NOMINAL IN; Style Designator: ROUND; Part Name Assigned by Controlling Agency: TRANSITION,FEMALE,MOD. 2 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.