Diameter: 17.844 INCHES MINIMUM AND 18.156 INCHES MAXIMUM IN
Blade Quantity: 4
Hub Location: FRONT
Material: STEEL OVERALL
Rotation Direction for Which Designed: CLOCKWISE
Identification
NSN: 4140-00-007-9639
NIIN: 000079639
FSC: 4140 — Fans, Air Circulators, and Blower Equipment
FSG: 41 — Refrigeration, AC, and Air Circulating Equipment
General Description
The Impeller,fan,axial, cataloged under National Stock Number 4140-00-007-9639, is classified within Federal Supply Class 4140 (Fans, Air Circulators, and Blower Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4140-00-007-9639
Item Name
Impeller,fan,axial
FSC / FSG
4140 / 41 — Fans, Air Circulators, and Blower Equipment
Status
ACTIVE
Style Designator
REVERSIBLE ROUNDED TIP
Attachment Method
SETSCREW
Diameter
17.844 INCHES MINIMUM AND 18.156 INCHES MAXIMUM IN
Blade Quantity
4
Hub Location
FRONT
Material
STEEL OVERALL
Rotation Direction for Which Designed
CLOCKWISE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
202105-1
3/9Design control — primary reference
Brookside Corp
No interchangeability data on file.
Other items in FSC 4140 — Fans, Air Circulators, and Blower Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4140-00-000-0082
IMPELLER,FAN,AXIAL
4140-00-001-1517
FAN,CENTRIFUGAL
4140-00-001-1536
FAN,VENTILATING
4140-00-001-1537
4140-00-001-1537 · Item name not on file
4140-00-001-3930
4140-00-001-3930 · Item name not on file
4140-00-001-6464
4140-00-001-6464 · Item name not on file
4140-00-001-6874
4140-00-001-6874 · Item name not on file
4140-00-001-6875
4140-00-001-6875 · Item name not on file
Frequently Asked Questions
What is NSN 4140-00-007-9639?
NSN 4140-00-007-9639 is a Impeller,fan,axial, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
What are the specifications of 4140-00-007-9639?
Key specifications for 4140-00-007-9639: Style Designator: REVERSIBLE ROUNDED TIP; Attachment Method: SETSCREW; Diameter: 17.844 INCHES MINIMUM AND 18.156 INCHES MAXIMUM IN; Blade Quantity: 4. 7 specifications are documented in the U.S. Government catalog.
Is NSN 4140-00-007-9639 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.