The Ventilator,air Circulating, cataloged under National Stock Number 2540-01-533-0631, is classified within Federal Supply Class 2540 (Vehicular Furniture and Accessories) of the Vehicular Equipment Components group. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 2540-01-533-0631 |
| Item Name | Ventilator,air Circulating |
| FSC / FSG | 2540 / 25 — Vehicular Furniture and Accessories |
| Status | ACTIVE |
| 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 |
| Reference | Meaning |
|---|---|
| 1001647 | 3/2 Design control — primary reference U.S. Government activity |
| 1001647 | 3/9 Design control — primary reference Hdt Tactical Power, Inc. |
| 2001232 REV T ITEM 53 | D/9 Drawing number reference only Hdt Tactical Power, Inc. |
NSN 2540-01-533-0631 is a Ventilator,air Circulating, classified under FSC 2540, Vehicular Furniture and Accessories. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5306-01-557-0238, 2530-01-577-7866. Verify interchangeability with system specifications before substitution.
Key specifications for 2540-01-533-0631: Overall Height: 6.500 INCHES NOMINAL IN; Overall Length: 18.500 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: LOUVER, DISCHARGE INSEPARABLE; End Item Identification: PU-820/T, GENERATOR SET, DIESEL ENGINE. 0 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.