The Heater,vehicular,compartment, cataloged under National Stock Number 2540-01-121-1691, is classified within Federal Supply Class 2540 (Vehicular Furniture and Accessories) of the Vehicular Equipment Components group. The manufacturer of record is Dcm Manufacturing, Inc.. Government technical data includes 20 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. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 2540-01-121-1691 |
| Primary Part Number | 556-12 |
| Item Name | Heater,vehicular,compartment |
| FSC / FSG | 2540 / 25 — Vehicular Furniture and Accessories |
| Manufacturer | Dcm Manufacturing, Inc. |
| Status | ACTIVE |
| Maximum Air Flow Rate | 250.0 CUBIC FEET PER MINUTE |
| Speed Adjustments | TWO SPEED |
| Heat Delivery Rate | 20000.0 BRITISH THERMAL UNIT |
| Current Type | DC |
| Heat Medium Type | HOT WATER |
| Quantity | 1 |
| Voltage in Volts | 12.0 |
| Heat Outlet Quantity | 3 |
| Heat Discharge Outlet Type | ADJUSTABLE |
| Heat Delivery Direction | HORIZONTAL AND VERTICAL |
| Height | 8.094 INCHES NOMINAL IN |
| Air Circulation Device | PROPELLER FAN |
| Depth | 8.750 INCHES NOMINAL IN |
| Width | 8.438 INCHES NOMINAL IN |
| Prime Mover Type | ELECTRIC MOTOR |
| Circulated Air Type | HEATED |
| Heat Directing Device | ADJUSTABLE LOUVER |
| Outlet Position | 90 DEG APART |
| Heating Element Type | HOT WATER COIL |
| Operating Control Type | HAND SWITCH |
| 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 |
|---|---|
| 556-12 PRIMARY | Dcm Manufacturing, Inc. (USA) |
NSN 2540-01-121-1691 is a Heater,vehicular,compartment, manufactured by Dcm Manufacturing, Inc., classified under FSC 2540, Vehicular Furniture and Accessories. Status: active.
NSN 2540-01-121-1691 has 1 manufacturer part number on file: 556-12 (Dcm Manufacturing, Inc.).
Key specifications for 556-12: Maximum Air Flow Rate: 250.0 CUBIC FEET PER MINUTE; Speed Adjustments: TWO SPEED; Heat Delivery Rate: 20000.0 BRITISH THERMAL UNIT; Current Type: DC. 20 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.