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20-3504 ✓ 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 HEATER,ELECTRONIC EQUIPMENT is a the manufacturer industrial component. Key specifications include material: CORK AND RESIN NATURAL OR RESIN SYNTHETIC OVERALL, outside_diameter: 2.000 INCHES NOMINAL IN, style_designator: CIRCULAR, aperture_diameter: 1.464 INCHES MINIMUM AND 1.474 INCHES MAXIMUM IN, cross-sectional_thickness: 0.281 INCHES NOMINAL IN, cross-sectional_shape_style: SOLID SINGLE OR COMPOSITION. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4540-00-004-7534, 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
20-3504
NSN: 4540-00-004-7534
FSC: 4540
CAGE: 14604 — HONEYWELL INTERNATIONAL INC. DBA HONEYWELL DIV SENSING AND CONTROL (USA)
SPECIFICATIONS
materialCORK AND RESIN NATURAL OR RESIN SYNTHETIC OVERALL
outside_diameter2.000 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter1.464 INCHES MINIMUM AND 1.474 INCHES MAXIMUM IN
cross-sectional_thickness0.281 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationHH-C-576 CL 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4540-00-004-7534
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available HEATER,ELECTRONIC EQUIPMENT TITLE COMPONENT PN 20-3504 MFR HEATER,ELECTRONIC EQUI
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: 0.250 IN. LG,9.300 IN. DIA IN
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTION0.250 IN. LG,9.300 IN. DIA IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
142928HInterchangeable
interchangeable cross-reference
interchangeable
301209Interchangeable
interchangeable cross-reference
interchangeable
55AC4421Interchangeable
interchangeable cross-reference
interchangeable
203504Interchangeable
interchangeable cross-reference
interchangeable
UC4421Interchangeable
interchangeable cross-reference
interchangeable
F19479Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20-3504?
20-3504 is a HEATER,ELECTRONIC EQUIPMENT.
What parts can replace 20-3504?
There are 7 known substitutes for 20-3504: 142928H, 301209, 55AC4421 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20-3504?
20-3504 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4540-00-004-7534. 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