The Fan,vaneaxial, cataloged under National Stock Number 4140-01-344-6490, 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 Naval Inventory Control Point Mechanicsburg. Government technical data includes 23 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-344-6490 |
| Primary Part Number | A1-1/2A4W6-NMVM |
| Item Name | Fan,vaneaxial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 20 UNTHREADED HOLE(S) |
| Speed Adjustments | SINGLE SPEED |
| Phase | THREE |
| Frequency in Hertz | 60.0 |
| Inclosure Type | FULLY INCLOSED |
| Length | 20.000 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 440.0 AC |
| Flow Direction | INWARD |
| Housing Inside Diameter | 17.500 INCHES NOMINAL IN |
| Drive Type | DIRECT |
| Prime Mover Power Rating | 1.250 HORSEPOWER |
| Style Designator | FIXED |
| Material Document and Classification | QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE HOUSING |
| Ambient Temp at Full Rated Power | 65.0 CELSIUS DEGC |
| Operating Speed at Rated Capacity in RPM | 3450.0 |
| Environmental Protection | SPRAY TIGHT |
| Material | ALUMINUM ALLOY 6061 HOUSING |
| Prime Mover Type | ELECTRIC MOTOR |
| Rotation Direction for Which Designed | COUNTERCLOCKWISE |
| Prime Mover Drive Shaft Bearing Type | BALL |
| Electrical Connection Type | WIRE LEAD |
| Static Pressure at Specified Air Flow Rate | ERR-060 |
| Air Flow Rate | 1500.0 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 |
|---|---|
| A1-1/2A4W6-NMVM | Naval Inventory Control Point Mechanicsburg (USA) |
| R1-12485 CD-3551VM | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| R1-12485 | 5/1 Secondary reference Fm Af, Llc Dba American Fan Company |
| R1-12485 CD-3551 | 3/1 Design control — primary reference Fm Af, Llc Dba American Fan Company |
| R1-12485 CD-3551 | 3/9 Design control — primary reference New Philadelphia Fan Co Buffalo Forge Marine Fans |
| R1-12485 | 5/9 Secondary reference New Philadelphia Fan Co Buffalo Forge Marine Fans |
NSN 4140-01-344-6490 is a Fan,vaneaxial, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-344-6490 has 2 manufacturer part numbers on file: A1-1/2A4W6-NMVM (Naval Inventory Control Point Mechanicsburg), R1-12485 CD-3551VM (Naval Inventory Control Point Mechanicsburg).
Key specifications for A1-1/2A4W6-NMVM: Mounting Facility Type and Quantity: 20 UNTHREADED HOLE(S); Speed Adjustments: SINGLE SPEED; Phase: THREE; Frequency in Hertz: 60.0. 23 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.