The Fan,vaneaxial, cataloged under National Stock Number 4140-01-142-2970, is classified within Federal Supply Class 4140 (Fans, Air Circulators, and Blower Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. Government technical data includes 25 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4140-01-142-2970 |
| Item Name | Fan,vaneaxial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 3 CLAMP |
| Speed Adjustments | SINGLE SPEED |
| Inclosure Type | FULLY INCLOSED |
| Length | 1.580 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 28.0 DC |
| Flow Direction | OUTWARD |
| Surface Treatment Document and Classification | MIL-C-5541,TYPE 1,GRADE C,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE AND MIL-E-5557,TYPE 4 MIL SPEC SINGLE TREATMENT RESPONSE HOUSING |
| Surface Treatment Document and Classification | MIL-E-5557,TYPE 4 MIL SPEC SINGLE TREATMENT RESPONSE BLADE |
| Housing Inside Diameter | 1.990 INCHES NOMINAL IN |
| Drive Type | DIRECT |
| Prime Mover Power Rating | 0.018 HORSEPOWER |
| Style Designator | FIXED |
| Material Document and Classification | QQ-A-591 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Ambient Temp at Full Rated Power | 125.0 CELSIUS DEGC |
| Operating Speed at Rated Capacity in RPM | 10900.0 |
| Surface Treatment | ENAMEL BLADE |
| Surface Treatment | CHROMATE AND ENAMEL HOUSING |
| Environmental Protection | DUSTPROOF AND EXPLOSION PROOF AND FUNGUS RESISTANT AND HUMIDITY PROOF AND SALT SPRAY RESISTANT AND SHOCK PROOF AND VIBRATION PROOF |
| Material | ALUMINUM ALLOY OVERALL |
| Prime Mover Type | ELECTRIC MOTOR |
| Rotation Direction for Which Designed | COUNTERCLOCKWISE |
| Prime Mover Drive Shaft Bearing Type | BALL |
| Electrical Connection Type | TERMINAL BLOCK |
| Static Pressure at Specified Air Flow Rate | ERR-060 |
| Air Flow Rate | 30.0 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 |
| Reference | Meaning |
|---|---|
| 530251-43 | 5/9 Secondary reference U.S. Government activity |
| 13153086-2 | 7/2 Vendor item drawing reference Us Army Aviation and Missile Command |
| 010346 | 3/2 Design control — primary reference U.S. Government activity |
| AXIMAX2H-1374YH | 5/2 Secondary reference U.S. Government activity |
NSN 4140-01-142-2970 is a Fan,vaneaxial, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6520-01-486-5546. Verify interchangeability with system specifications before substitution.
Key specifications for 4140-01-142-2970: Mounting Facility Type and Quantity: 3 CLAMP; Speed Adjustments: SINGLE SPEED; Inclosure Type: FULLY INCLOSED; Length: 1.580 INCHES NOMINAL IN. 25 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.