The Fan,centrifugal, cataloged under National Stock Number 4140-01-424-4571, 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 Emcor Enclosures Llc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-424-4571 |
| Primary Part Number | BL-290 |
| Item Name | Fan,centrifugal |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Emcor Enclosures Llc |
| Status | ACTIVE |
| Speed Adjustments | SINGLE SPEED |
| Phase | SINGLE |
| Frequency in Hertz | 60.0 |
| Length | 7.570 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 115.0 AC |
| Drive Type | DIRECT |
| Prime Mover Power Rating | 125.0 WATTS |
| Style Designator | FIXED, DUAL, RECTANGULAR OUTLETS |
| Height | 5.250 INCHES NOMINAL IN |
| Operating Speed at Rated Capacity in RPM | 3050.0 |
| Width | 19.000 INCHES NOMINAL IN |
| Prime Mover Type | ELECTRIC MOTOR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| BL-290 PRIMARY | Emcor Enclosures Llc (USA) |
| Reference | Meaning |
|---|---|
| 91004N0007 | 7/2 Vendor item drawing reference Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service |
NSN 4140-01-424-4571 is a Fan,centrifugal, manufactured by Emcor Enclosures Llc, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-424-4571 has 1 manufacturer part number on file: BL-290 (Emcor Enclosures Llc).
Key specifications for BL-290: Speed Adjustments: SINGLE SPEED; Phase: SINGLE; Frequency in Hertz: 60.0; Length: 7.570 INCHES NOMINAL IN. 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.
NSN 4140-01-424-4571 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.