The Impeller,fan,centrifugal, cataloged under National Stock Number 4140-00-974-7582, 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 Schwitzer Engine Components a Household Intl Co. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-00-974-7582 |
| Primary Part Number | A138178 |
| Item Name | Impeller,fan,centrifugal |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Schwitzer Engine Components a Household Intl Co |
| Status | ACTIVE |
| Style Designator | CURVED BLADES SINGLE WIDTH |
| Attachment Method | RETAINING RING |
| Diameter | 5.980 INCHES NOMINAL IN |
| Blade Quantity | 20 |
| Width | 1.000 INCHES NOMINAL IN |
| Material | STEEL 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 |
|---|---|
| A138178 PRIMARY | Schwitzer Engine Components a Household Intl Co (USA) |
| Reference | Meaning |
|---|---|
| 631GC27 | 5/9 Secondary reference Mack Trucks Inc Parts Opn |
| 701575 | C/1 Advisory reference — outside the item-of-supply concept Dresser, Llc |
NSN 4140-00-974-7582 is a Impeller,fan,centrifugal, manufactured by Schwitzer Engine Components a Household Intl Co, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-00-974-7582 has 1 manufacturer part number on file: A138178 (Schwitzer Engine Components a Household Intl Co).
Key specifications for A138178: Style Designator: CURVED BLADES SINGLE WIDTH; Attachment Method: RETAINING RING; Diameter: 5.980 INCHES NOMINAL IN; Blade Quantity: 20. 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.