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Technical Data Sheet
PartsTable / COMPONENT / 576521
576521 ✓ 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 LIMITER,TEMPERATURE,DEFOG DUCT is a the manufacturer industrial component. Key specifications include end_item_identification: 1660000339178, general_characteristics_item_description: ALUMINUM;4.250 IN. LG IN.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 1660-00-887-3271, 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
576521
NSN: 1660-00-887-3271
FSC: 1660
CAGE: 73030 — HAMILTON SUNDSTRAND CORPORATION DBA COLLINS AEROSPACE (USA)
SPECIFICATIONS
end_item_identification1660000339178
general_characteristics_item_descriptionALUMINUM;4.250 IN. LG IN
NSN1660-00-887-3271
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available LIMITER,TEMPERATURE,DEFOG DUCT TITLE COMPONENT PN 576521 MFR LIMITER,TEMPERATURE,DE
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: ALUMINUM;4.250 IN. LG IN
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONALUMINUM;4.250 IN. LG IN
END ITEM IDENTIFICATION1660000339178
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
1958595Interchangeable
interchangeable cross-reference
interchangeable
387660PHInterchangeable
interchangeable cross-reference
interchangeable
10542Interchangeable
interchangeable cross-reference
interchangeable
513569Interchangeable
interchangeable cross-reference
interchangeable
550992Interchangeable
interchangeable cross-reference
interchangeable
MIL-T-55164/3Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 576521?
576521 is a LIMITER,TEMPERATURE,DEFOG DUCT.
What parts can replace 576521?
There are 14 known substitutes for 576521: 1958595, 387660PH, 10542 and 11 more. Substitute compatibility should be verified for your specific system.
Is 576521 still available?
576521 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026