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PartsTable / COMPONENT / 4555-G503
4555-G503 ✓ 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 HEAT EXCHANGER,SHIPBOARD is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4420-01-135-6859, 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
4555-G503
NSN: 4420-01-135-6859
FSC: 4420
CAGE: 22501 — HOWELL LABORATORIES INC DBA HOWELL LABORATORIES INC (USA)
SPECIFICATIONS
Part Number4555-G503
NSN4420-01-135-6859
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available HEAT EXCHANGER,SHIPBOARD TITLE COMPONENT PN 4555-G503 MFR HEAT EXCHANGER,SHIPBOA
KEY FEATURES
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GENERAL CHARACTERISTICS ITEM DESCRIPTION: CONSISTS OF 1 CAP,PLUG; 1 ARMAFLEX; 1 HEAT EXCHANGER COVER; 1 SENSOR WELL ASSY; 1 COUPLING; 2 90 DEG ELBOWS; 1 COVER; 4 N0.0 DRIVE SCREW; 1 HEAT EXCHANGER SHELL ASSY; 4 N0.8 LOCKWASHER; 4 8-32X1/2 SCREW; 2 90 DEG ELBOW; 1 PRECOOLER COIL,DRY; 1 PRECOOLER COIL,WET; 1 EVAPORATOR COIL ASSY; 1 HEAT EXCHANGER,BOTTOM PLATE ASSY; 12 LBS INSULATION LBS
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONCONSISTS OF 1 CAP,PLUG; 1 ARMAFLEX; 1 HEAT EXCHANGER COVER; 1 SENSOR WELL ASSY; 1 COUPLING; 2 90 DEG ELBOWS; 1 COVER; 4 N0.0 DRIVE SCREW; 1 HEAT EXCHANGER SHELL ASSY; 4 N0.8 LOCKWASHER; 4 8-32X1/2 SCREW; 2 90 DEG ELBOW; 1 PRECOOLER COIL,DRY; 1 PRECOOLER COIL,WET; 1 EVAPORATOR COIL ASSY; 1 HEAT EXCHANGER,BOTTOM PLATE ASSY; 12 LBS INSULATION LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
389915PC67Interchangeable
interchangeable cross-reference
interchangeable
E38933-4PC67Interchangeable
interchangeable cross-reference
interchangeable
533540ALTW1PC67Interchangeable
interchangeable cross-reference
interchangeable
4552Interchangeable
interchangeable cross-reference
interchangeable
4555Interchangeable
interchangeable cross-reference
interchangeable
8500180-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4555-G503?
4555-G503 is a HEAT EXCHANGER,SHIPBOARD.
What parts can replace 4555-G503?
There are 11 known substitutes for 4555-G503: 389915PC67, E38933-4PC67, 533540ALTW1PC67 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4555-G503?
4555-G503 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4420-01-135-6859. 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