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Technical Data Sheet
B21251 ✓ 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 FAN,CENTRIFUGAL is a the manufacturer thermal management component critical for maintaining optimal operating temperatures in enterprise hardware. Key specifications include phase: SINGLE, width: 7.125 INCHES NOMINAL IN, height: 4.469 INCHES NOMINAL IN, length: 4.812 INCHES NOMINAL IN, material: STEEL OVERALL, end_style: SPRING END,SQUARED AND GROUND BOTH ENDS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5360-00-316-4572, 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
B21251
NSN: 5360-00-316-4572
FSC: 5360
CAGE: 92208 — LITTON SYSTEMS INC ITEK OPTICAL SYSTEMS DIV (USA)
SPECIFICATIONS
phaseSINGLE
width7.125 INCHES NOMINAL IN
height4.469 INCHES NOMINAL IN
length4.812 INCHES NOMINAL IN
materialSTEEL OVERALL
end_styleSPRING END,SQUARED AND GROUND BOTH ENDS
drive_typeDIRECT
air_flow_rate120.0 CUBIC FEET PER MINUTE NOMINAL
coil_quantity11-1/2
inclosure_typeFULLY INCLOSED
inside_diameter0.13313 INCHES NOMINAL IN
outlet_locationTOP
NSN5360-00-316-4572
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available FAN,CENTRIFUGAL TITLE COMPONENT PN B21251 MFR FAN,CENTRIFUGAL
KEY FEATURES
SPRING FREE LENGTH: 0.875 INCHES NOMINAL IN
INSIDE DIAMETER: 0.13313 INCHES NOMINAL IN
STYLE DESIGNATOR: CYLINDRICAL
COIL QUANTITY: 11-1/2
SPRING SOLID OUTSIDE DIAMETER: 0.406 INCHES NOMINAL IN
MATERIAL: STEEL UNS K08500 OVERALL
END STYLE: SPRING END,SQUARED AND GROUND BOTH ENDS
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TYPICAL APPLICATIONS
  • Server thermal management and cooling
  • Hot-swap fan replacement in production environments
  • Redundant cooling for high-availability systems
TECHNICAL CHARACTERISTICS (FLIS)
SPRING FREE LENGTH0.875 INCHES NOMINAL IN
INSIDE DIAMETER0.13313 INCHES NOMINAL IN
STYLE DESIGNATORCYLINDRICAL
COIL QUANTITY11-1/2
SPRING SOLID OUTSIDE DIAMETER0.406 INCHES NOMINAL IN
MATERIALSTEEL UNS K08500 OVERALL
END STYLESPRING END,SQUARED AND GROUND BOTH ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-W-470 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SPRING FREE OUTSIDE DIAMETER0.406 INCHES NOMINAL IN
COIL HELIX DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
62383P020Interchangeable
interchangeable cross-reference
interchangeable
71861Interchangeable
interchangeable cross-reference
interchangeable
62383Interchangeable
interchangeable cross-reference
interchangeable
DRPP-QS2501CCW-315AFInterchangeable
interchangeable cross-reference
interchangeable
A0-19083Interchangeable
interchangeable cross-reference
interchangeable
591D103-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B21251?
B21251 is a FAN,CENTRIFUGAL.
What parts can replace B21251?
There are 10 known substitutes for B21251: 62383P020, 71861, 62383 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B21251?
B21251 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5360-00-316-4572. This indicates validated use in U.S. government and defense supply chains.
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