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Technical Data Sheet
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6N4540 — Technical Data Sheet

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CATERPILLAR INC DIV CATERPILLAR DEFENSE · 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 THERMOSTAT,FLOW CONTROL is a CATERPILLAR INC DIV CATERPILLAR DEFENSE industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6685-00-425-5141, 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
6N4540
NSN: 6685-00-425-5141
FSC: 6685
CAGE: A4159 — COMPAGNIA GENERALE TRATTORI -S.P.A. ABBREVIATA C.G.T.-S.P.A. (ITA)
SPECIFICATIONS
Part Number6N4540
ManufacturerCATERPILLAR INC DIV CATERPILLAR DEFENSE
NSN6685-00-425-5141
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: CATERPILLAR INC DIV CATERPILLAR DEFENSE THERMOSTAT,FLOW CONTROL TITLE COMPONENT PN 6N4540 MFR CATERPILLAR INC DIV CATERPILLAR DEFENSE THERMOSTAT,FLOW CONTRO
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
1273Interchangeable
interchangeable cross-reference
interchangeable
52430Interchangeable
interchangeable cross-reference
interchangeable
20BC02PInterchangeable
interchangeable cross-reference
interchangeable
5274-146Interchangeable
interchangeable cross-reference
interchangeable
203-1011P56Interchangeable
interchangeable cross-reference
interchangeable
203M0047P002Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6N4540?
6N4540 is a THERMOSTAT,FLOW CONTROL manufactured by CATERPILLAR INC DIV CATERPILLAR DEFENSE.
What parts can replace 6N4540?
There are 23 known substitutes for 6N4540: 1273, 52430, 20BC02P and 20 more. Substitute compatibility should be verified for your specific system.
Is 6N4540 still available?
6N4540 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: September 2026