The Heater,vehicular,compartment, cataloged under National Stock Number 2540-01-441-5673, is classified within Federal Supply Class 2540 (Vehicular Furniture and Accessories) of the Vehicular Equipment Components group. The manufacturer of record is Jbar A/c Inc. Government technical data includes 5 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 2540-01-441-5673 |
| Primary Part Number | J503639 |
| Item Name | Heater,vehicular,compartment |
| FSC / FSG | 2540 / 25 — Vehicular Furniture and Accessories |
| Manufacturer | Jbar A/c Inc |
| Status | ACTIVE |
| Heat Medium Type | AIR |
| Height | 21.690 INCHES NOMINAL IN |
| Depth | 6.980 INCHES NOMINAL IN |
| Width | 21.300 INCHES NOMINAL IN |
| Heating Element Type | ELECTRIC NONIMMERSION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| J503639 PRIMARY | Jbar A/c Inc (USA) |
| Reference | Meaning |
|---|---|
| 6620992 | 5/9 Secondary reference Jlg Industries, Inc. |
| 503-639 | 5/9 Secondary reference Eagle Mfg Co |
| 6620992 | 5/9 Secondary reference Trak International |
| 6623232 | 5/9 Secondary reference Jlg Industries, Inc. |
NSN 2540-01-441-5673 is a Heater,vehicular,compartment, manufactured by Jbar A/c Inc, classified under FSC 2540, Vehicular Furniture and Accessories. Status: active.
NSN 2540-01-441-5673 has 1 manufacturer part number on file: J503639 (Jbar A/c Inc).
Key specifications for J503639: Heat Medium Type: AIR; Height: 21.690 INCHES NOMINAL IN; Depth: 6.980 INCHES NOMINAL IN; Width: 21.300 INCHES NOMINAL IN. 5 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.