The Fresh Air Heater, cataloged under National Stock Number 2540-01-170-9945, is classified within Federal Supply Class 2540 (Vehicular Furniture and Accessories) of the Vehicular Equipment Components group. The manufacturer of record is Amz Alabama Inc.. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Fresh Air Heater |
| FSC / FSG | 2540 — Vehicular Furniture and Accessories (FSG 25) |
| Manufacturers | Bae Systems Hagglunds Aktiebolag (CAGE AC90N); Amz Alabama Inc. (CAGE 076M6) |
| Parameter | Value |
|---|---|
| NSN | 2540-01-170-9945 |
| Primary Part Number | 90159-991 |
| Item Name | Fresh Air Heater |
| FSC / FSG | 2540 / 25 — Vehicular Furniture and Accessories |
| Manufacturer | Amz Alabama Inc. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 153 6354-801 | Bae Systems Hagglunds Aktiebolag (SWE) |
| 90159-991 PRIMARY | Amz Alabama Inc. (USA) |
| Reference | Meaning |
|---|---|
| 472-9954 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 90159-991 | 3/9 Design control — primary reference U.s. Defense Services, Inc. Dba Usds |
| 1536354-801 | 5/9 Secondary reference Bae Systems Hagglunds Ab |
| 101022011001A | 5/9 Secondary reference Technique Appliquee Marches Mediterranee |
NSN 2540-01-170-9945 is a Fresh Air Heater, manufactured by Amz Alabama Inc., classified under FSC 2540, Vehicular Furniture and Accessories. Status: active.
NSN 2540-01-170-9945 has 2 manufacturer part numbers on file: 153 6354-801 (Bae Systems Hagglunds Aktiebolag), 90159-991 (Amz Alabama Inc.).
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.