FSC: 4140 — Fans, Air Circulators, and Blower Equipment
FSG: 41 — Refrigeration, AC, and Air Circulating Equipment
General Description
The Impeller,fan,centrifugal, cataloged under National Stock Number 4140-00-020-9768, 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 6 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4140-00-020-9768
Item Name
Impeller,fan,centrifugal
FSC / FSG
4140 / 41 — Fans, Air Circulators, and Blower Equipment
Status
ACTIVE
Style Designator
CURVED BLADES SINGLE WIDTH
Attachment Method
SETSCREW
Diameter
3.000 INCHES NOMINAL IN
Blade Quantity
24
Width
1.875 INCHES NOMINAL IN
Material
STEEL BLADE
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
⇄Related Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5935-00-173-3523POSSIBLE MATCH
BACKSHELL,ELECTRICAL CONNECTOR
Possible match (shared part number)
5355-00-538-2723S1020POSSIBLE MATCH
DIAL,SCALE
Possible match (shared part number)The Dewey Electronics Corporation Div Pitometer Log Division
5940-01-107-5164S1020POSSIBLE MATCH
SPLICE,CONDUCTOR
Possible match (shared part number)Tattnall, County of Dba Tattnall County Sheriffs Office
5905-01-175-9799POSSIBLE MATCH
RESISTOR,FIXED,WIRE WOUND,INDUCT
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
S1020
3/9Design control — primary reference
Zero Corp Mclean Engineering Div
Related Parts
5935-00-173-3523POSSIBLE MATCH
BACKSHELL,ELECTRICAL CONNECTOR
5355-00-538-2723POSSIBLE MATCH
DIAL,SCALE
S1020
5940-01-107-5164POSSIBLE MATCH
SPLICE,CONDUCTOR
S1020
5905-01-175-9799POSSIBLE MATCH
RESISTOR,FIXED,WIRE WOUND,INDUCT
Frequently Asked Questions
What is NSN 4140-00-020-9768?
NSN 4140-00-020-9768 is a Impeller,fan,centrifugal, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.
What NSN replaces 4140-00-020-9768?
4 possible matches (shared part number, not a government interchangeability claim): 5935-00-173-3523, 5355-00-538-2723, 5940-01-107-5164. Verify interchangeability with system specifications before substitution.
What are the specifications of 4140-00-020-9768?
Key specifications for 4140-00-020-9768: Style Designator: CURVED BLADES SINGLE WIDTH; Attachment Method: SETSCREW; Diameter: 3.000 INCHES NOMINAL IN; Blade Quantity: 24. 6 specifications are documented in the U.S. Government catalog.
Is NSN 4140-00-020-9768 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.