The Impeller,fan,axial, cataloged under National Stock Number 4140-00-428-4144, 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 United Technologies Corp Electro Systems Inc. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-00-428-4144 |
| Primary Part Number | FN609-1 |
| Item Name | Impeller,fan,axial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | United Technologies Corp Electro Systems Inc |
| Status | ACTIVE |
| Style Designator | REVERSIBLE ROUNDED TIP |
| Attachment Method | KEYWAY |
| Diameter | 4.750 INCHES NOMINAL IN |
| Blade Quantity | 13 |
| Hub Location | FRONT |
| Material | ALUMINUM ALLOY OVERALL |
| 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 |
|---|---|
| 8F2119 | Caterpillar Inc Div Caterpillar Defense (USA) |
| FN609-1 PRIMARY | United Technologies Corp Electro Systems Inc (USA) |
| FN609 | United Technologies Corp Electro Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| FN609 | 5/9 Secondary reference Ambac International Corporation Div Ambac International |
| FN609-1 | 5/9 Secondary reference Ambac International Corporation Div Ambac International |
NSN 4140-00-428-4144 is a Impeller,fan,axial, manufactured by United Technologies Corp Electro Systems Inc, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-00-428-4144 has 3 manufacturer part numbers on file: 8F2119 (Caterpillar Inc Div Caterpillar Defense), FN609-1 (United Technologies Corp Electro Systems Inc), FN609 (United Technologies Corp Electro Systems Inc).
Key specifications for FN609-1: Style Designator: REVERSIBLE ROUNDED TIP; Attachment Method: KEYWAY; Diameter: 4.750 INCHES NOMINAL IN; Blade Quantity: 13. 6 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.