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 SHAFT ASSEMBLY,FAN is a the manufacturer thermal management component critical for maintaining optimal operating temperatures in enterprise hardware. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4310-00-173-4771, 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
1A181-161
NSN:4310-00-173-4771 FSC:4310 CAGE:35301 — DRESSER INDUSTRIES INC LEROI DIV (USA)
SPECIFICATIONS
general_characteristics_item_description
STEEL;O/A LG 5.640 IN;OD 2.625 IN.;FOUR THD HOLES 0.312-18 UNC,2B,RH,EQUALLY SPACED ON 2.180 IN. BOLT CIRCLE;ROLLER BEARING 2.532 IN. LG;HUB AND ROLLER BEARING IS PRESSED ON SHAFT IN
NSN
4310-00-173-4771
COMPONENT DIAGRAM
KEY FEATURES
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GENERAL CHARACTERISTICS ITEM DESCRIPTION: STEEL;O/A LG 5.640 IN;OD 2.625 IN.;FOUR THD HOLES 0.312-18 UNC,2B,RH,EQUALLY SPACED ON 2.180 IN. BOLT CIRCLE;ROLLER BEARING 2.532 IN. LG;HUB AND ROLLER BEARING IS PRESSED ON SHAFT IN
TYPICAL APPLICATIONS
Server thermal management and cooling
Hot-swap fan replacement in production environments
Redundant cooling for high-availability systems
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTION
STEEL;O/A LG 5.640 IN;OD 2.625 IN.;FOUR THD HOLES 0.312-18 UNC,2B,RH,EQUALLY SPACED ON 2.180 IN. BOLT CIRCLE;ROLLER BEARING 2.532 IN. LG;HUB AND ROLLER BEARING IS PRESSED ON SHAFT IN
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FREQUENTLY ASKED QUESTIONS
What is 1A181-161?
1A181-161 is a SHAFT ASSEMBLY,FAN.
What parts can replace 1A181-161?
There are 15 known substitutes for 1A181-161: 8KT8E12, 22401, 22-101 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1A181-161?
1A181-161 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4310-00-173-4771. This indicates validated use in U.S. government and defense supply chains.
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