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Cummins · Hardware & Fasteners
3678912CUM
In stock · ships from Knoxville
This is an O-ring seal manufactured by Cummins for diesel engine applications.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 2 applications
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All confirmed applications for this part number.
Other applications
Other applications
Exact seal location (e.g., oil cooler, filter housing, or timing cover) not specified in available listings. Verify against your engine serial number or parts diagram to confirm compatibility.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 1 of 1.
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O-rings provide a reliable, replaceable seal at mating surfaces to prevent oil, coolant, or fuel leaks. It is commonly replaced during engine teardown or routine gasket and seal maintenance when the original ring shows signs of hardening, cracking, or deformation.
Part Number: 3678912CUM
SEAL O RING 4
Dealer: KP Services Crossville
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