The Impeller,fan,axial, cataloged under National Stock Number 4140-01-250-4201, 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 Fm Af, Llc Dba American Fan Company. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-250-4201 |
| Primary Part Number | 7W-32981-1 |
| Item Name | Impeller,fan,axial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Fm Af, Llc Dba American Fan Company |
| Status | ACTIVE |
| Diameter | 18.689 INCHES MINIMUM AND 18.693 INCHES MAXIMUM IN |
| Blade Quantity | 7 |
| Material | ALUMINUM OVERALL |
| 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 |
|---|---|
| 8W-3995 ITEM 8 | Fm Af, Llc Dba American Fan Company (USA) |
| 7W-32981-1 PRIMARY | Fm Af, Llc Dba American Fan Company (USA) |
| Reference | Meaning |
|---|---|
| 7W-32981-1 | 5/9 Secondary reference New Philadelphia Fan Co Buffalo Forge Marine Fans |
| 8W-3995 ITEM 8 | 5/9 Secondary reference New Philadelphia Fan Co Buffalo Forge Marine Fans |
NSN 4140-01-250-4201 is a Impeller,fan,axial, manufactured by Fm Af, Llc Dba American Fan Company, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-250-4201 has 2 manufacturer part numbers on file: 8W-3995 ITEM 8 (Fm Af, Llc Dba American Fan Company), 7W-32981-1 (Fm Af, Llc Dba American Fan Company).
Key specifications for 7W-32981-1: Diameter: 18.689 INCHES MINIMUM AND 18.693 INCHES MAXIMUM IN; Blade Quantity: 7; Material: ALUMINUM OVERALL; Rotation Direction for Which Designed: COUNTERCLOCKWISE. 4 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.