The Fan,vaneaxial, cataloged under National Stock Number 4140-01-331-1668, 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 17 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4140-01-331-1668 |
| Primary Part Number | A1A4W6-TP |
| Item Name | Fan,vaneaxial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Fm Af, Llc Dba American Fan Company |
| Status | ACTIVE |
| Speed Adjustments | SINGLE SPEED |
| Phase | THREE |
| Frequency in Hertz | 60.0 |
| Length | 4.938 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 440.0 AC |
| Housing Inside Diameter | 14.750 INCHES NOMINAL IN |
| Drive Type | DIRECT |
| Prime Mover Power Rating | 0.750 HORSEPOWER |
| Style Designator | FIXED |
| Features Provided | THERMAL PROTECTIVE DEVICE |
| Operating Speed at Rated Capacity in RPM | 3600.0 |
| Material | ALUMINUM ALLOY BLADE |
| Material | STEEL HOUSING |
| Prime Mover Type | ELECTRIC MOTOR |
| Rotation Direction for Which Designed | COUNTERCLOCKWISE |
| Electrical Connection Type | TERMINAL |
| Air Flow Rate | 1000.0 CUBIC FEET PER MINUTE NOMINAL |
| 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 |
|---|---|
| A1A4W6-TP PRIMARY | Fm Af, Llc Dba American Fan Company (USA) |
| 9W-58437 CD-3544 | Fm Af, Llc Dba American Fan Company (USA) |
| Reference | Meaning |
|---|---|
| A1A4W6-TP/MIL-F -18953A | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| A1A4W6-TP | 5/9 Secondary reference New Philadelphia Fan Co Buffalo Forge Marine Fans |
| 9W-58437 CD-3544 | 5/9 Secondary reference New Philadelphia Fan Co Buffalo Forge Marine Fans |
NSN 4140-01-331-1668 is a Fan,vaneaxial, manufactured by Fm Af, Llc Dba American Fan Company, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-331-1668 has 2 manufacturer part numbers on file: A1A4W6-TP (Fm Af, Llc Dba American Fan Company), 9W-58437 CD-3544 (Fm Af, Llc Dba American Fan Company).
1 possible match (shared part number, not a government interchangeability claim): 4140-01-508-6223. Verify interchangeability with system specifications before substitution.
Key specifications for A1A4W6-TP: Speed Adjustments: SINGLE SPEED; Phase: THREE; Frequency in Hertz: 60.0; Length: 4.938 INCHES NOMINAL IN. 17 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.