The Impeller,fan,axial, cataloged under National Stock Number 4140-01-322-8131, 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. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-322-8131 |
| Primary Part Number | R1-3561 PC 1 |
| 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 |
| Reference Number Differentiating Characteristics | MAGNETIC PERMEABILITY SHALL NOT EXCEED 2.0 AFTER FABRICATION |
| 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 |
|---|---|
| R1-3561 PC 1 | Fm Af, Llc Dba American Fan Company (USA) |
| R1-3561 PC 1VM | Naval Inventory Control Point Mechanicsburg (USA) |
| 7W-71874-1VM | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| R1-3561 PC 1 | 5/9 Secondary reference New Philadelphia Fan Co Buffalo Forge Marine Fans |
| 7W-71874-1 | 5/9 Secondary reference New Philadelphia Fan Co Buffalo Forge Marine Fans |
| 7W-71874-1 | 3/1 Design control — primary reference Fm Af, Llc Dba American Fan Company |
NSN 4140-01-322-8131 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 4140-01-322-8131 has 3 manufacturer part numbers on file: R1-3561 PC 1 (Fm Af, Llc Dba American Fan Company), R1-3561 PC 1VM (Naval Inventory Control Point Mechanicsburg), 7W-71874-1VM (Naval Inventory Control Point Mechanicsburg).
Key specifications for R1-3561 PC 1: End Item Identification: FANS,AIR CIRCULATORS,AND BLOWER EQUIPMENT; Reference Number Differentiating Characteristics: MAGNETIC PERMEABILITY SHALL NOT EXCEED 2.0 AFTER FABRICATION. 1 specification is 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.