The Fan,ventilating, cataloged under National Stock Number 4140-01-253-7648, is classified within Federal Supply Class 4140 (Fans, Air Circulators, and Blower Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is Schroff Inc. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-253-7648 |
| Primary Part Number | 301-1044-100 |
| Item Name | Fan,ventilating |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Schroff Inc |
| Status | ACTIVE |
| Drive Type | DIRECT |
| Quantity | 3 |
| Style Designator | FIXED, MULTI-UNIT |
| Height | 8.250 INCHES NOMINAL IN |
| Prime Mover Type | ELECTRIC MOTOR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AD38180-2 | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
| 301-1044-100 PRIMARY | Schroff Inc (USA) |
| Reference | Meaning |
|---|---|
| 301-1044-100 | 3/9 Design control — primary reference Calmark Corporation |
NSN 4140-01-253-7648 is a Fan,ventilating, manufactured by Schroff Inc, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-253-7648 has 2 manufacturer part numbers on file: AD38180-2 (Hamilton Sundstrand Corporation Dba Collins Aerospace), 301-1044-100 (Schroff Inc).
1 possible match (shared part number, not a government interchangeability claim): 4140-01-272-3173. Verify interchangeability with system specifications before substitution.
Key specifications for 301-1044-100: Drive Type: DIRECT; Quantity: 3; Style Designator: FIXED, MULTI-UNIT; Height: 8.250 INCHES NOMINAL IN. 5 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.