The Fan,tubeaxial, cataloged under National Stock Number 4140-01-296-4952, 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 Rotron Inc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4140-01-296-4952 |
| Primary Part Number | JD48B2 |
| Item Name | Fan,tubeaxial |
| FSC / FSG | 4140 / 41 — Fans, Air Circulators, and Blower Equipment |
| Manufacturer | Rotron Inc |
| Status | ACTIVE |
| Speed Adjustments | TWO SPEED |
| Length | 2.000 INCHES NOMINAL IN |
| Voltage in Volts and Current Type | 24.0 DC OR 56.0 DC |
| Housing Inside Diameter | 6.750 INCHES NOMINAL IN |
| Drive Type | DIRECT |
| Prime Mover Power Rating | 22.0 WATTS |
| Style Designator | FIXED |
| Ambient Temp at Full Rated Power | -10.0 CELSIUS AND 70.0 CELSIUS DEGC |
| Operating Speed at Rated Capacity in RPM | 3350.0 |
| Material | ALUMINUM HOUSING |
| Prime Mover Drive Shaft Bearing Type | BALL |
| Air Flow Rate | 240.0 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 |
|---|---|
| JD48B2 | Rotron Inc (USA) |
| 853-48V-6X | Ametek Programmable Power, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 032150 | 5/9 Secondary reference Comair Rotron Inc Sub of Kl Industries Inc |
| JD48B2 | 5/9 Secondary reference Comair Rotron Inc Sub of Kl Industries Inc |
| 031091 | 3/9 Design control — primary reference Comair Rotron Inc Sub of Kl Industries Inc |
NSN 4140-01-296-4952 is a Fan,tubeaxial, manufactured by Rotron Inc, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
NSN 4140-01-296-4952 has 2 manufacturer part numbers on file: JD48B2 (Rotron Inc), 853-48V-6X (Ametek Programmable Power, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 6540-01-509-5809, 6515-01-515-4118. Verify interchangeability with system specifications before substitution.
Key specifications for JD48B2: Speed Adjustments: TWO SPEED; Length: 2.000 INCHES NOMINAL IN; Voltage in Volts and Current Type: 24.0 DC OR 56.0 DC; Housing Inside Diameter: 6.750 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.