Thermostat illustration – not the actual part
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Thermostat illustration – not the actual partDiesel Parts Direct logo

Aftermarket parts may appear slightly different, including the packaging.

Cummins6CTA / ISC / QSCThermostats

Cummins 3928640 Thermostat For C Series Diesel Engines

(71degC / 160degF)

Genuine Cummins Part

OEM #: 3928640SKU: 3928640

Ships in 1-2 days

$125.44

Taxes and Shipping are calculated at checkout

Return with 20% Fee

SKU 3928640
OEM Number 3928640
Part Type Thermostats
OEM Brand CUMMINS

Aftermarket warranty

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Genuine Cummins parts warranty

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Call any of our friendly Parts Dept. Specialists with your engine serial number, and we can quickly verify whether this part is the correct part for your engine — no guesswork.

Phone: 888.687.0539

Don't know how to find your engine serial number? Go to our Engine Help Center for assistance.

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