The Fan,vaneaxial, cataloged under National Stock Number 4140-01-549-6521, 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 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4140-01-549-6521 |
| Item Name | Fan,vaneaxial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Status | ACTIVE |
| Phase | THREE |
| Frequency in Hertz | 400.0 |
| Inclosure Type | PARTIALLY INCLOSED |
| Voltage in Volts and Current Type | 200.0 AC |
| Housing Inside Diameter | 2.750 INCHES NOMINAL IN |
| Drive Type | DIRECT |
| Style Designator | FIXED |
| Ambient Temp at Full Rated Power | 90.0 CELSIUS DEGC |
| Operating Speed at Rated Capacity in RPM | 15595.0 |
| Prime Mover Type | ELECTRIC MOTOR |
| Rotation Direction for Which Designed | CLOCKWISE |
| Electrical Connection Type | WIRE LEAD |
| 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 |
|---|---|
| 041031000 | 3/2 Design control — primary reference U.S. Government activity |
| 041031 | 5/9 Secondary reference U.S. Government activity |
NSN 4140-01-549-6521 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): 6115-01-561-7438. Verify interchangeability with system specifications before substitution.
Key specifications for 4140-01-549-6521: Phase: THREE; Frequency in Hertz: 400.0; Inclosure Type: PARTIALLY INCLOSED; Voltage in Volts and Current Type: 200.0 AC. 12 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.