The Impeller,fan,axial, cataloged under National Stock Number 4140-01-421-3618, 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 Fm Af, Llc Dba American Fan Company. The record lists 2 manufacturer part numbers 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.
| Item Name | Impeller,fan,axial |
| FSC / FSG | 4140 — Fans, Air Circulators, and Blower Equipment (FSG 41) |
| Manufacturers | Fm Af, Llc Dba American Fan Company (CAGE 75477) |
| Parameter | Value |
|---|---|
| NSN | 4140-01-421-3618 |
| Primary Part Number | FF-18509 PC 2 |
| Item Name | Impeller,fan,axial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Fm Af, Llc Dba American Fan Company |
| Status | ACTIVE |
| 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 |
|---|---|
| 505551-1503 | Fm Af, Llc Dba American Fan Company (USA) |
| FF-18509 PC 2 PRIMARY | Fm Af, Llc Dba American Fan Company (USA) |
NSN 4140-01-421-3618 is a Impeller,fan,axial, manufactured by Fm Af, Llc Dba American Fan Company, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-421-3618 has 2 manufacturer part numbers on file: 505551-1503 (Fm Af, Llc Dba American Fan Company), FF-18509 PC 2 (Fm Af, Llc Dba American Fan Company).
1 possible match (shared part number, not a government interchangeability claim): 3040-01-599-7225. Verify interchangeability with system specifications before substitution.
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.