The Impeller,fan,centrifugal, cataloged under National Stock Number 4140-00-142-2491, 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 8 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-00-142-2491 |
| Item Name | Impeller,fan,centrifugal |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Status | ACTIVE |
| Style Designator | CURVED BLADES SINGLE WIDTH |
| Attachment Method | SETSCREW |
| Diameter | 2.500 INCHES NOMINAL IN |
| Blade Quantity | 28 |
| Width | 1.530 INCHES NOMINAL IN |
| Material | ALUMINUM OVERALL |
| Rotation Direction for Which Designed | CLOCKWISE |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY ALUMINUM HUB; DYNAMIC BALANCING TO 0.009 OZ INCHES AT 2000 RPM OZ |
| 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 |
|---|---|
| 8836220-1 | C/1 Advisory reference — outside the item-of-supply concept L3 Technologies, Inc. Div Communication Systems-East |
| A2699-3 | 3/1 Design control — primary reference Regal-Beloit Corporation Dba Fasco Group Div Cassville Division |
| AA216-115-2CWALUM 0.25BORE | 5/1 Secondary reference Regal-Beloit Corporation Dba Fasco Group Div Cassville Division |
| 8836220-1 | 5/9 Secondary reference Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin |
NSN 4140-00-142-2491 is a Impeller,fan,centrifugal, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
Key specifications for 4140-00-142-2491: Style Designator: CURVED BLADES SINGLE WIDTH; Attachment Method: SETSCREW; Diameter: 2.500 INCHES NOMINAL IN; Blade Quantity: 28. 8 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.