The Impeller,fan,centrifugal, cataloged under National Stock Number 4140-01-225-9539, 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 Way Wolff Associates Inc. Government technical data includes 3 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-225-9539 |
| Primary Part Number | M170-0 |
| Item Name | Impeller,fan,centrifugal |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Way Wolff Associates Inc |
| Status | ACTIVE |
| Diameter | 6.250 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| M170-0 PRIMARY | Way Wolff Associates Inc (USA) |
NSN 4140-01-225-9539 is a Impeller,fan,centrifugal, manufactured by Way Wolff Associates Inc, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-225-9539 has 1 manufacturer part number on file: M170-0 (Way Wolff Associates Inc).
1 possible match (shared part number, not a government interchangeability claim): 6230-01-532-4061. Verify interchangeability with system specifications before substitution.
Key specifications for M170-0: Diameter: 6.250 INCHES NOMINAL IN; End Item Identification: BURNER,WAY-WOLFE MODELS 917 AND 2128; Material: STEEL OVERALL; Rotation Direction for Which Designed: CLOCKWISE. 3 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.