The Fan,centrifugal, cataloged under National Stock Number 4140-01-412-0790, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4140-01-412-0790 |
| Primary Part Number | FI-1139SZ-21 MW-CW-TH-ARR9L |
| Item Name | Fan,centrifugal |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Fm Af, Llc Dba American Fan Company |
| Status | ACTIVE |
| Phase | THREE |
| Shaft Bearing Type | BALL |
| Frequency in Hertz | 60.0 |
| Voltage in Volts and Current Type | 460.0 AC |
| Drive Type | BELT |
| 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 |
|---|---|
| FI-1139SZ-21 MW-CW-TH-ARR9L PRIMARY | Fm Af, Llc Dba American Fan Company (USA) |
| Reference | Meaning |
|---|---|
| FI 1139 SZ 21 M W-CW-TH-ARR9L | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| FI-1139SZ-21 MW-CW-TH-ARR9L | 3/9 Design control — primary reference New Philadelphia Fan Co Buffalo Forge Marine Fans |
NSN 4140-01-412-0790 is a Fan,centrifugal, manufactured by Fm Af, Llc Dba American Fan Company, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-412-0790 has 1 manufacturer part number on file: FI-1139SZ-21 MW-CW-TH-ARR9L (Fm Af, Llc Dba American Fan Company).
Key specifications for FI-1139SZ-21 MW-CW-TH-ARR9L: Phase: THREE; Shaft Bearing Type: BALL; Frequency in Hertz: 60.0; Voltage in Volts and Current Type: 460.0 AC. 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.