The Fan,tubeaxial, cataloged under National Stock Number 4140-00-993-5273, 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 Dynamic Air Engineering, Inc.. Government technical data includes 18 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4140-00-993-5273 |
| Primary Part Number | M4381B1B1 |
| Item Name | Fan,tubeaxial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Dynamic Air Engineering, Inc. |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 2 FLANGE AND 12 UNTHREADED HOLE(S) |
| Speed Adjustments | SINGLE SPEED |
| Inclosure Type | FULLY INCLOSED |
| Length | 4.585 INCHES MINIMUM AND 4.595 INCHES MAXIMUM IN |
| Voltage in Volts and Current Type | 27.0 DC |
| Flow Direction | INWARD |
| Housing Inside Diameter | 4.515 INCHES NOMINAL IN |
| Drive Type | DIRECT |
| Prime Mover Power Rating | 0.016 HORSEPOWER |
| Style Designator | FIXED |
| Diameter | 4.370 INCHES MINIMUM AND 4.380 INCHES MAXIMUM IN |
| Features Provided | NONSPARKING |
| Operating Speed at Rated Capacity in RPM | 4950.0 |
| Surface Treatment | CHROMATE AND LACQUER BLADE |
| Prime Mover Type | ELECTRIC MOTOR |
| Rotation Direction for Which Designed | CLOCKWISE |
| Prime Mover Drive Shaft Bearing Type | BALL |
| Electrical Connection Type | TERMINAL |
| 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 |
|---|---|
| M4381B1B1 PRIMARY | Dynamic Air Engineering, Inc. (USA) |
NSN 4140-00-993-5273 is a Fan,tubeaxial, manufactured by Dynamic Air Engineering, Inc., classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-00-993-5273 has 1 manufacturer part number on file: M4381B1B1 (Dynamic Air Engineering, Inc.).
Key specifications for M4381B1B1: Mounting Facility Type and Quantity: 2 FLANGE AND 12 UNTHREADED HOLE(S); Speed Adjustments: SINGLE SPEED; Inclosure Type: FULLY INCLOSED; Length: 4.585 INCHES MINIMUM AND 4.595 INCHES MAXIMUM IN. 18 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.