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28056403 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The GUARD,FAN IMPELLER is a the manufacturer thermal management component critical for maintaining optimal operating temperatures in enterprise hardware. Key specifications include shape: ROUND, body_material: STEEL, mounting_method: HOLE, overall_diameter: 4.500 INCHES NOMINAL IN, surface_treatment: CHROMATE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4140-01-367-0791, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
28056403
NSN: 4140-01-367-0791
FSC: 4140
CAGE: 083V0 — GLOBAL ASSOCIATES LTD SIGNAL PROCESSING SYSTEMS (USA)
SPECIFICATIONS
shapeROUND
body_materialSTEEL
mounting_methodHOLE
overall_diameter4.500 INCHES NOMINAL IN
surface_treatmentCHROMATE
NSN4140-01-367-0791
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available GUARD,FAN IMPELLER TITLE COMPONENT PN 28056403 MFR GUARD,FAN IMPELLER
KEY FEATURES
•
SURFACE TREATMENT: CHROMATE
•
OVERALL DIAMETER: 4.500 INCHES NOMINAL IN
•
MOUNTING METHOD: HOLE
•
SHAPE: ROUND
•
BODY MATERIAL: STEEL
TYPICAL APPLICATIONS
  • Server thermal management and cooling
  • Hot-swap fan replacement in production environments
  • Redundant cooling for high-availability systems
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTCHROMATE
OVERALL DIAMETER4.500 INCHES NOMINAL IN
MOUNTING METHODHOLE
SHAPEROUND
BODY MATERIALSTEEL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
65302-12559-104Interchangeable
interchangeable cross-reference
interchangeable
3204-1Interchangeable
interchangeable cross-reference
interchangeable
C40L72Interchangeable
interchangeable cross-reference
interchangeable
M39010-02-10-5PCInterchangeable
interchangeable cross-reference
interchangeable
MS90537-25Interchangeable
interchangeable cross-reference
interchangeable
240-2715-252Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 28056403?
28056403 is a GUARD,FAN IMPELLER.
What parts can replace 28056403?
There are 8 known substitutes for 28056403: 65302-12559-104, 3204-1, C40L72 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 28056403?
28056403 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4140-01-367-0791. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026