The Fan,vaneaxial, cataloged under National Stock Number 4140-01-503-9931, 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 Howden American Fan Company Dba American Fan Co Div Howden Usa Company. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-503-9931 |
| Primary Part Number | A7A4W6/TP |
| Item Name | Fan,vaneaxial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Howden American Fan Company Dba American Fan Co Div Howden Usa Company |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 28 BOLT |
| Length | 32.000 INCHES NOMINAL IN |
| Flow Direction | INWARD |
| Housing Inside Diameter | 19.562 INCHES NOMINAL IN |
| Drive Type | DIRECT |
| Style Designator | FIXED |
| Specification/standard Data | 81349-MIL-F-18953 GOVERNMENT SPECIFICATION |
| Material | ALUMINUM ALLOY BLADE |
| Material | STEEL HOUSING |
| Rotation Direction for Which Designed | COUNTERCLOCKWISE |
| Static Pressure at Specified Air Flow Rate | ERR-060 |
| Air Flow Rate | 7000.0 CUBIC FEET PER MINUTE NOMINAL |
| 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 |
|---|---|
| A7A4W6/TP PRIMARY | Howden American Fan Company Dba American Fan Co Div Howden Usa Company (USA) |
| A7A4W6-TP PRIMARY | Fm Af, Llc Dba American Fan Company (USA) |
| Reference | Meaning |
|---|---|
| NV 00015 REV D | D/9 Drawing number reference only Howden American Fan Company Dba American Fan Co Div Howden Usa Company |
NSN 4140-01-503-9931 is a Fan,vaneaxial, manufactured by Howden American Fan Company Dba American Fan Co Div Howden Usa Company, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-503-9931 has 2 manufacturer part numbers on file: A7A4W6/TP (Howden American Fan Company Dba American Fan Co Div Howden Usa Company), A7A4W6-TP (Fm Af, Llc Dba American Fan Company).
Key specifications for A7A4W6/TP: Mounting Facility Type and Quantity: 28 BOLT; Length: 32.000 INCHES NOMINAL IN; Flow Direction: INWARD; Housing Inside Diameter: 19.562 INCHES NOMINAL IN. 12 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.