The Impeller,fan,centrifugal, cataloged under National Stock Number 4140-01-299-1633, 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 Twin City Fan Companies Ltd. Dba Tc Axial Div. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4140-01-299-1633 |
| Primary Part Number | AC-13044A |
| Item Name | Impeller,fan,centrifugal |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Twin City Fan Companies Ltd. Dba Tc Axial Div |
| Status | ACTIVE |
| Mounting Hole Quantity | 4 |
| Attachment Method | BOLT HOLE |
| Mounting Hole Diameter | 0.359 INCHES NOMINAL IN |
| Diameter | 10.546 INCHES NOMINAL IN |
| Blade Quantity | 32 |
| Mounting Bolt Circle Diameter | 5.000 INCHES NOMINAL IN |
| Width | 6.031 INCHES NOMINAL IN |
| Rotation Direction for Which Designed | CLOCKWISE |
| 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 |
|---|---|
| AC-13044A PRIMARY | Twin City Fan Companies Ltd. Dba Tc Axial Div (USA) |
| 1544486 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 57-SA-1527 | 5/9 Secondary reference Trane U.s. Inc. Dba Trane Div Cleveland Sales District |
NSN 4140-01-299-1633 is a Impeller,fan,centrifugal, manufactured by Twin City Fan Companies Ltd. Dba Tc Axial Div, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-299-1633 has 2 manufacturer part numbers on file: AC-13044A (Twin City Fan Companies Ltd. Dba Tc Axial Div), 1544486 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for AC-13044A: Mounting Hole Quantity: 4; Attachment Method: BOLT HOLE; Mounting Hole Diameter: 0.359 INCHES NOMINAL IN; Diameter: 10.546 INCHES NOMINAL IN. 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.