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Caterpillar · Hardware & Fasteners
5H7153
In stock · ships from Knoxville
This is a silicone O-ring seal, often called a nozzle adapter seal ring, for Caterpillar diesel engines.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 10 applications
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All confirmed applications for this part number.
Caterpillar
Caterpillar
Verify engine serial number prefix (e.g., 4CK, 4MG, 7FB) to confirm exact fit. Seals the nozzle adapter bore in the cylinder head.
Part data verified against 5 catalog sources
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It fits between the injector nozzle adapter and the cylinder head, sealing combustion gases and keeping oil and fuel passages separate. You replace it whenever an injector is removed or serviced because a compressed or damaged seal can cause hard starting, power loss, or fluid cross-contamination. It is a direct replacement for Caterpillar part number 5H‑7153 and fits many 3406, 3408, 3412, and C‑series engines.
Part Number: 5H7153
O-RING SEAL
Vendor: STOWERS MACHINERY
Dealer: Knox Trailers
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