The Fan,tubeaxial, cataloged under National Stock Number 4140-01-186-3976, 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 Ashland Electric Products Inc. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-01-186-3976 |
| Primary Part Number | V25Z3K-1 |
| Item Name | Fan,tubeaxial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Ashland Electric Products Inc |
| Status | ACTIVE |
| Length | 4.200 INCHES MINIMUM AND 4.230 INCHES MAXIMUM IN |
| Housing Inside Diameter | 3.570 INCHES MINIMUM AND 3.620 INCHES MAXIMUM IN |
| Style Designator | FIXED |
| Ambient Temp at Full Rated Power | -54.0 CELSIUS AND 82.0 CELSIUS DEGC |
| Environmental Protection | EXPLOSION PROOF AND HUMIDITY PROOF AND SHOCK PROOF AND VIBRATION PROOF |
| Prime Mover Type | ELECTRIC MOTOR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| V25Z3K-1 PRIMARY | Ashland Electric Products Inc (USA) |
| M3541A-1A PRIMARY | Dynamic Air Engineering, Inc. (USA) |
| 605912-2-1 | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| 605912-2-1 PRIMARY | Honeywell International Inc. Div Aerospace - Torrance (USA) |
| Reference | Meaning |
|---|---|
| 929029 | 5/9 Secondary reference Lockheed Martin Corp Electronics and Missiles Div |
| L5555 | 5/9 Secondary reference Dynamic Air Engineering, Inc. |
NSN 4140-01-186-3976 is a Fan,tubeaxial, manufactured by Ashland Electric Products Inc, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-186-3976 has 4 manufacturer part numbers on file: V25Z3K-1 (Ashland Electric Products Inc), M3541A-1A (Dynamic Air Engineering, Inc.), 605912-2-1 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us), 605912-2-1 (Honeywell International Inc. Div Aerospace - Torrance).
2 possible matches (shared part number, not a government interchangeability claim): 4720-01-644-6939, 4720-01-644-6941. Verify interchangeability with system specifications before substitution.
Key specifications for V25Z3K-1: Length: 4.200 INCHES MINIMUM AND 4.230 INCHES MAXIMUM IN; Housing Inside Diameter: 3.570 INCHES MINIMUM AND 3.620 INCHES MAXIMUM IN; Style Designator: FIXED; Ambient Temp at Full Rated Power: -54.0 CELSIUS AND 82.0 CELSIUS DEGC. 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.
NSN 4140-01-186-3976 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.