The Diffuser,air,vehicular Heating a, cataloged under National Stock Number 2540-01-642-7850, is classified within Federal Supply Class 2540 (Vehicular Furniture and Accessories) of the Vehicular Equipment Components group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 2540-01-642-7850 |
| Primary Part Number | 12509499-001 |
| Item Name | Diffuser,air,vehicular Heating a |
| FSC / FSG | 2540 / 25 — Vehicular Furniture and Accessories |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Material Document and Classification | ASTM 02000 -4CA710A25CF19 ASSN STD ALL MATERIAL RESPONSES |
| 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 |
|---|---|
| 12509499-001 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 12509499 | D/9 Drawing number reference only U S Army Tank Automotive Command Amsta-Im-Mm |
NSN 2540-01-642-7850 is a Diffuser,air,vehicular Heating a, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 2540, Vehicular Furniture and Accessories. Status: active.
NSN 2540-01-642-7850 has 1 manufacturer part number on file: 12509499-001 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12509499-001: Overall Height: 0.125 INCHES NOMINAL IN; Material Document and Classification: ASTM 02000 -4CA710A25CF19 ASSN STD ALL MATERIAL RESPONSES; Overall Length: 762.0 MILLIMETERS NOMINAL MM; Overall Width: 76.2 MILLIMETERS NOMINAL MM. 1 specification is 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.