The Impeller,fan,axial, cataloged under National Stock Number 4140-01-504-4349, 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 Howden American Fan Company Dba American Fan Co Div Howden Usa Company. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4140-01-504-4349 |
| Primary Part Number | A105A4W6LMP |
| Item Name | Impeller,fan,axial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Howden American Fan Company Dba American Fan Co Div Howden Usa Company |
| Status | ACTIVE |
| Mounting Hole Quantity | 4 |
| Style Designator | STRAIGHT TIP |
| Attachment Method | BOLT HOLE |
| Mounting Hole Diameter | 25.4 MILLIMETERS NOMINAL MM |
| Blade Quantity | 13 |
| Hub Location | BACK |
| Material | ALUMINUM ALLOY BLADE |
| Rotation Direction for Which Designed | COUNTERCLOCKWISE |
| 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 |
|---|---|
| NV00019 ITEM 3 | Howden American Fan Company Dba American Fan Co Div Howden Usa Company (USA) |
| A105A4W6LMP PRIMARY | Howden American Fan Company Dba American Fan Co Div Howden Usa Company (USA) |
| Reference | Meaning |
|---|---|
| A105A4W6IMP | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 4140-01-504-4349 is a Impeller,fan,axial, manufactured by Howden American Fan Company Dba American Fan Co Div Howden Usa Company, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-504-4349 has 2 manufacturer part numbers on file: NV00019 ITEM 3 (Howden American Fan Company Dba American Fan Co Div Howden Usa Company), A105A4W6LMP (Howden American Fan Company Dba American Fan Co Div Howden Usa Company).
1 possible match (shared part number, not a government interchangeability claim): 4140-01-508-4478. Verify interchangeability with system specifications before substitution.
Key specifications for A105A4W6LMP: Mounting Hole Quantity: 4; Style Designator: STRAIGHT TIP; Attachment Method: BOLT HOLE; Mounting Hole Diameter: 25.4 MILLIMETERS NOMINAL MM. 8 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.